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Context: Adjuvant imatinib administered for 12 months after surgery has improved recurrence-free survival (RFS) of patients with operable gastrointestinal stromal tumor (GIST) compared with placebo.Objective: To investigate the role of imatinib administration duration as adjuvant treatment of patients who have a high estimated risk for GIST recurrence after surgery.Design, Setting, and Patients: Patients with KIT-positive GIST removed at surgery were entered between February 2004 and September 2008 to this randomized, open-label phase 3 study conducted in 24 hospitals in Finland, Germany, Norway, and Sweden. The risk of GIST recurrence was estimated using the modified National Institutes of Health Consensus Criteria.Intervention: Imatinib, 400 mg per day, orally for either 12 months or 36 months, started within 12 weeks of surgery.Main Outcome Measures: The primary end point was RFS; the secondary end points included overall survival and treatment safety.Results: Two hundred patients were allocated to each group. The median follow-up time after randomization was 54 months in December 2010. Diagnosis of GIST was confirmed in 382 of 397 patients (96%) in the intention-to-treat population at a central pathology review. KIT or PDGFRA mutation was detected in 333 of 366 tumors (91%) available for testing. Patients assigned for 36 months of imatinib had longer RFS compared with those assigned for 12 months (hazard ratio [HR], 0.46; 95% CI, 0.32-0.65; P < .001; 5-year RFS, 65.6% vs 47.9%, respectively) and longer overall survival (HR, 0.45; 95% CI, 0.22-0.89; P = .02; 5-year survival, 92.0% vs 81.7%). Imatinib was generally well tolerated, but 12.6% and 25.8% of patients assigned to the 12- and 36-month groups, respectively, discontinued imatinib for a reason other than GIST recurrence.Conclusion: Compared with 12 months of adjuvant imatinib, 36 months of imatinib improved RFS and overall survival of GIST patients with a high risk of GIST recurrence.Trial Registration: clinicaltrials.gov Identifier: NCT00116935. [ABSTRACT FROM AUTHOR]

Introduction: In squamous cell carcinoma of the esophagus (ESCC), therapeutical options in 2nd-line treatment are scarce with immune checkpoint inhibition being the only approved one. Ramucirumab/paclitaxel is an approved 2nd-line treatment in metastatic esophagogastric adenocarcinoma. We assessed safety and efficacy of ramucirumab/paclitaxel for ESCC., Methods: This prospective, randomized, open-label, multicenter, phase II trial evaluated paclitaxel (80 mg/m2 days 1, 8, 15) plus ramucirumab (8 mg/kg days 1, 15) (investigational arm A) versus paclitaxel alone (80 mg/m2 days 1, 8, 15) (standard arm B), both q4w, in advanced/metastatic ESCC refractory or intolerant to fluoropyrimidine and platinum-based drugs. Primary endpoint was overall survival (OS) rate at 6 months., Results: From 3/2019 to 4/2021, 21/186 planned patients were included (arm A 11 patients; arm B 10 patients) in 9 German centers. Due to slow accrual, the study was terminated prematurely. OS at 6 months was 72.7% for ramucirumab/paclitaxel and 50.0% for paclitaxel. The study design did not allow statistical comparison of the arms. PFS (3.8 vs. 3.5 months), OS (12.1 vs. 9.2 months), ORR (18.2% vs. 20.0%) and DCR (54.5% vs. 60.0%) were comparable in both arms. Most common treatment-related adverse events (TRAEs) in arm A were leucopenia (54.5%), fatigue (27.3%), and peripheral sensory neuropathy (18.2%). 27.3% in arm A and 50.0% in arm B had TRAEs ≥ grade 3., Conclusion: Ramucirumab/paclitaxel shows an acceptable tolerability and numerically improved OS at 6 months. Due to the small number of patients, the current trial must be considered exploratory and more data are needed in this indication., (© 2024 S. Karger AG, Basel.)

Competing Interests: S-EA-B reports research funding from Celgene, Lilly, Sanofi, German Cancer Aid (Krebshilfe), the German Research Foundation, the Federal Ministry of Education and Research of Germany, Roche, Eurozyto, Immutep, Ipsen, Bristol-Myers Squibb, Merck Sharp & Dohme, and AstraZeneca; consulting fees from Bristol-Myers Squibb, Merck Sharp & Dohme, and Ely Lilly Germany; and speaker's fees from MCI Deutschland GmbH. S-EA-B is the Director of and holds stocks in the Frankfurter Institut für Klinische Krebsforschung IKF GmbH, which is not involved in the field of oesophageal squamous cell cancer treatment. CK reports speaker's fees from MSD, DGVS, Bristol-Myers Squibb, MCI Deutschland GmbH, AstraZeneca, Servier, and Incyte; and meeting support from Ipsen, Merck, Roche, and AstraZeneca.

FOLFOX plus nivolumab represents a standard of care for first-line therapy of advanced gastroesophageal cancer (aGEC) with positive PD-L1 expression. The efficacy of second-line VEGFR-2 inhibition with ramucirumab (RAM) plus chemotherapy after progression to immunochemotherapy remains unclear. Medical records of patients with aGEC enrolled in the randomized phase II AIO-STO-0417 trial after treatment failure to first-line FOLFOX plus nivolumab and ipilimumab were retrospectively analyzed. Patients were divided into two groups based on second-line therapy: RAM plus chemotherapy (RAM group) or treatment without RAM (control group). Eighty three patients were included. In the overall population, progression-free survival (PFS) in the RAM group was superior to the control (4.5 vs 2.9 months). Responders (CR/PR) to first-line immunochemotherapy receiving RAM containing second-line therapy had prolonged OS from start of first-line therapy (28.9 vs 16.5 months), as well as second-line OS (9.6 vs 7.5 months), PFS (5.6 vs 2.9 months) and DCR (53% vs 29%) compared to the control. PD-L1 CPS ≥1 was 42% and 44% for the RAM and the control, respectively. Patients with CPS ≥1 in the RAM group showed better tumor control (ORR 25% vs 10%) and improved survival (total OS 11.5 vs 8.0 months; second-line OS 6.5 vs 3.9 months; PFS 4.5 vs 1.6 months) compared to the control. Prior exposure to first-line FOLFOX plus dual checkpoint inhibition followed by RAM plus chemotherapy shows favorable response and survival rates especially in patients with initial response and positive PD-L1 expression and has the potential to advance the treatment paradigm in aGEC., (© 2024 The Authors. International Journal of Cancer published by John Wiley & Sons Ltd on behalf of UICC.)

Purpose: Open-label phase II study (RELATIVITY-060) to investigate the efficacy and safety of first-line nivolumab, a PD-1-blocking antibody, plus relatlimab, a lymphocyte-activation gene 3 (LAG-3)-blocking antibody, plus chemotherapy in patients with previously untreated advanced gastric cancer (GC) or gastroesophageal junction cancer (GEJC)., Methods: Patients with unresectable, locally advanced or metastatic GC/GEJC were randomly assigned 1:1 to nivolumab + relatlimab (fixed-dose combination) + chemotherapy or nivolumab + chemotherapy. The primary end point was objective response rate (ORR; per RECIST v1.1 by blinded independent central review [BICR]) in patients whose tumors had LAG-3 expression ≥1%., Results: Of 274 patients, 138 were randomly assigned to nivolumab + relatlimab + chemotherapy and 136 to nivolumab + chemotherapy. Median follow-up was 11.9 months. In patients with LAG-3 expression ≥1%, BICR-assessed ORR (95% CI) was 48% (38 to 59) in the nivolumab + relatlimab + chemotherapy arm and 61% (51 to 71) in the nivolumab + chemotherapy arm; median progression-free survival (95% CI) by BICR was 7.0 months (5.8 to 8.4) versus 8.3 months (6.9 to 12.1; hazard ratio [HR], 1.41 [95% CI, 0.97 to 2.05]), and median overall survival (95% CI) was 13.5 months (11.9 to 19.1) versus 16.0 months (10.9 to not estimable; HR, 1.04 [95% CI, 0.70 to 1.54]), respectively. Grade 3 or 4 treatment-related adverse events (TRAEs) occurred in 69% and 61% of all treated patients, and 42% and 36% of patients discontinued because of any-grade TRAEs in the nivolumab + relatlimab + chemotherapy and nivolumab + chemotherapy arms, respectively., Conclusion: RELATIVITY-060 did not meet its primary end point of improved ORR in patients with LAG-3 expression ≥1% when relatlimab was added to nivolumab + chemotherapy compared with nivolumab + chemotherapy. Further studies are needed to address whether adding anti-LAG-3 to anti-PD-1 plus chemotherapy can benefit specific GC/GEJC patient subgroups.

Background: Although addition of adjuvant chemotherapy is the current standard, the prognosis of pancreatic cancers still remains poor. The NEPAFOX trial evaluated perioperative treatment with FOLFIRINOX in resectable pancreatic cancer., Patients and Methods: This multicenter phase II trial randomized patients with resectable or borderline resectable pancreatic cancer without metastases into arm (A,) upfront surgery plus adjuvant gemcitabine, or arm (B,) perioperative FOLFIRINOX. The primary endpoint was overall survival (OS)., Results: Owing to poor accrual, recruitment was prematurely stopped after randomization of 40 of the planned 126 patients (A: 21, B: 19). Overall, approximately three-quarters were classified as primarily resectable (A: 16, B: 15), and the remaining patients were classified as borderline resectable (A: 5, B: 4). Of the 12 evaluable patients, 3 achieved partial response under neoadjuvant FOLFIRINOX. Of the 21 patients in arm A and 19 patients in arm B, 17 and 7 underwent curative surgery, and R0-resection was achieved in 77% and 71%, respectively. Perioperative morbidity occurred in 72% in arm A and 46% in arm B, whereas non-surgical toxicity was comparable in both arms. Median RFS/PFS was almost doubled in arm B (14.1 months) compared with arm A (8.4 months) in the population with surgical resection, whereas median OS was comparable between both arms., Conclusions: Although the analysis was only descriptive owing to small patient numbers, no safety issues regarding surgical complications were observed in the perioperative FOLFIRINOX arm. Thus, considering the small number of patients, perioperative treatment approach appears feasible and potentially effective in well-selected cohorts of patients. In pancreatic cancer, patient selection before initiation of neoadjuvant therapy appears to be critical., (© 2024. The Author(s).)

Biliary tract cancer is a highly heterogeneous group of gastrointestinal cancers, and the only curative treatment is surgery, which is only applicable at early stages of the malignancy. ADJUBIL, a phase II trial (NCT05239169), aims to evaluate immunotherapy with durvalumab and tremelimumab with or without capecitabine in adjuvant situations for biliary tract cancers. A total of 40 prospective patients will be randomly assigned following surgery, consisting of a two-arm feasibility pilot part with a pick-the-winner design with durvalumab and tremelimumab in combination with or without capecitabine.

Purpose: This trial evaluates the addition of the PD-L1 antibody atezolizumab (ATZ) to standard-of-care fluorouracil, leucovorin, oxaliplatin, and docetaxel (FLOT) as a perioperative treatment for patients with resectable esophagogastric adenocarcinoma (EGA)., Methods: DANTE started as multicenter, randomized phase II trial, which was subsequently converted to a phase III trial. Here, we present the results of the phase II proportion, focusing on surgical pathology and safety outcomes on an exploratory basis. Patients with resectable EGA (≥cT2 or cN+) were assigned to either four preoperative and postoperative cycles of FLOT combined with ATZ, followed by eight cycles of ATZ maintenance (arm A) or FLOT alone (arm B)., Results: Two hundred ninety-five patients were randomly assigned (A, 146; B, 149) with balanced baseline characteristics between arms. Twenty-three patients (8%) had tumors with microsatellite instability (MSI), and 58% patients had tumors with a PD-L1 combined positive score (CPS) of ≥1. Surgical morbidity (A, 45%; B, 42%) and 60-day mortality (A, 3%; B, 2%) were comparable between arms. Downstaging favored arm A versus arm B (ypT0, 23% v 15% [one-sided P = .044]; ypT0-T2, 61% v 48% [one-sided P = .015]; ypN0, 68% v 54% [one-sided P = .012]). Histopathologic complete regression rates (pathologic complete response or TRG1a) were higher after FLOT plus ATZ (A, 24%; B, 15%; one-sided P = .032), and the difference was more pronounced in the PD-L1 CPS ≥10 (A, 33%; B, 12%) and MSI (A, 63%; B, 27%) subpopulations. Complete margin-free (R0) resection rates were relatively high in both arms (A, 96%; B, 95%). The incidence and severity of adverse events were similar in both groups., Conclusion: Within the limitations of the exploratory nature of the data, the addition of ATZ to perioperative FLOT is safe and improved postoperative stage and histopathologic regression.

Background: The benefit of combination neoadjuvant and adjuvant chemotherapy and immune checkpoint inhibition in patients with locally advanced, resectable gastric or gastro-oesophageal adenocarcinoma is unknown. We assess the antitumor activity of neoadjuvant and adjuvant pembrolizumab plus chemotherapy in patients with locally advanced resectable gastric or gastro-oesophageal adenocarcinoma., Methods: The KEYNOTE-585 study is a multicentre, randomised, placebo-controlled, double-blind, phase 3 study done at 143 medical centres in 24 countries. Eligible patients were aged 18 years or older with untreated, locally advanced, resectable gastric or gastro-oesophageal adenocarcinoma, and an Eastern Cooperative Oncology Group performance status 0-1. Patients were randomly assigned (1:1) by an interactive voice response system and integrated web response system to neoadjuvant pembrolizumab 200 mg intravenously or placebo (saline) plus cisplatin-based doublet chemotherapy (main cohort) every 3 weeks for 3 cycles, followed by surgery, adjuvant pembrolizumab or placebo plus chemotherapy for 3 cycles, then adjuvant pembrolizumab or placebo for 11 cycles. A small cohort was also randomly assigned (1:1) to pembrolizumab or placebo plus fluorouracil, docetaxel, and oxaliplatin (FLOT)-based chemotherapy (FLOT cohort) every 2 weeks for four cycles, followed by surgery, adjuvant pembrolizumab, or placebo plus FLOT for four cycles, then adjuvant pembrolizumab or placebo for 11 cycles. Patients were stratified by geographic region, tumour stage, and chemotherapy backbone. Primary endpoints were pathological complete response (reviewed centrally), event-free survival (reviewed by the investigator), and overall survival in the intention-to-treat population, and safety assessed in all patients who received at least one dose of study treatment. The study is registered at ClinicalTrials.gov, NCT03221426, and is closed to accrual., Findings: Between Oct 9, 2017, and Jan 25, 2021, of 1254 patients screened, 804 were randomly assigned to the main cohort, of whom 402 were assigned to the pembrolizumab plus cisplatin-based chemotherapy group and 402 to the placebo plus cisplatin-based chemotherapy group, and 203 to the FLOT cohort, of whom 100 were assigned to the pembrolizumab plus FLOT group and 103 to placebo plus FLOT group. In the main cohort of 804 participants, 575 (72%) were male and 229 (28%) were female. In the main cohort, after median follow-up of 47·7 months (IQR 38·0-54·8), pembrolizumab was superior to placebo for pathological complete response (52 [12·9%; 95% CI 9·8-16·6] of 402 vs eight [2·0%; 0·9-3·9] of 402; difference 10·9%, 95% CI 7·5 to 14·8; p<0·00001). Median event-free survival was longer with pembrolizumab versus placebo (44·4 months, 95% CI 33·0 to not reached vs 25·3 months, 20·6 to 33·9; hazard ratio [HR] 0·81, 95% CI 0·67 to 0·99; p=0·0198) but did not meet the threshold for statistical significance (p=0·0178). Median overall survival was 60·7 months (95% CI 51·5 to not reached) in the pembrolizumab group versus 58·0 months (41·5 to not reached) in the placebo group (HR 0·90, 95% CI 0·73 to 1·12; p=0·174). Grade 3 or worse adverse events of any cause occurred in 312 (78%) of 399 patients in the pembrolizumab group and 297 (74%) of 400 patients in the placebo group; the most common were nausea (240 [60%] vs 247 [62%]), anaemia (168 [42%] vs 158 [40%]), and decreased appetite (163 [41%] vs 172 [43%]). Treatment-related serious adverse events were reported in 102 (26%) and 97 (24%) patients. Treatment-related adverse events that led to death occurred in four (1%) patients in the pembrolizumab group (interstitial ischaemia, pneumonia, decreased appetite, and acute kidney injury [n=1 each]) and two (<1%) patients in the placebo group (neutropenic sepsis and neutropenic colitis [n=1 each])., Interpretation: Although neoadjuvant and adjuvant pembrolizumab versus placebo improved the pathological complete response, it did not translate to significant improvement in event-free survival in patients with untreated, locally advanced resectable gastric or gastro-oesophageal cancer., Funding: Merck Sharp & Dohme., Competing Interests: Declaration of interests KS reports research funding to their institution from Astellas Pharma, Ono Pharmaceutical, Daiichi Sankyo, Taiho Pharmaceutical, Chugai Pharma, Merck Sharp & Dohme, Amgen, and Eisai, consulting fees from Eli Lilly, Bristol-Myers Squibb, Takeda Pharmaceutical, Novartis, Abbive, Daiichi Sankyo, Taiho Pharmaceutical, GlaxoSmithKline, Amgen, Boehringer Ingelheim, Merck Sharp & Dohme, Astellas, Guardant Health Japan, and Janssen, and honoraria from Bristol-Myers Squibb, Takeda Pharmaceuticals, and Janssen; SYR reports research funding to their institution from Amgen, Astellas, Daiichi Sankyo, Eisai, Merck, Roche, Zymework, Indivumed, Merck Sharp & Dohme, Ono Pharmaceutical, Bristol-Myers Squibb, and AstraZeneca, consultancy fees from Amgen, Astellas, Daiichi Sankyo, Eisai, LG Biochem, Indivumed, Merck Sharp & Dohme, Ono Pharmaceutical, Bristol-Myers Squibb, and AstraZeneca, and fees for speaker bureau from Eli Lilly, Eisai, Daiichi Sankyo, Merck Sharp & Dohme, Ono Pharmaceutical, and Bristol-Myers Squibb; LSW, PY, JX, SA, MO, HYab, Y-KP, TO, and NK report research funding to their institution from Merck Sharp & Dohme; S-EA-B reports research funding to their institution from Celgene, Eli Lilly, Sanofi, German Cancer Aid, German Research Foundation, German Federal Ministry of Education and Research, Roche, Vifor Pharma, Eurozyto, Immutep, Ipsen, Bristol-Myers Squibb, Merck Sharp & Dohme, and AstraZeneca, fees for speakers' bureau participation from Eli Lilly, AIO, Bristol-Myers Squibb, and MCI Group, fees for consulting or advisory role for Bristol-Myers Squibb, Merck Sharp & Dohme, AstraZeneca, Daiichi Sankyo, and Eli Lilly Germany, and stock ownership in Institut fir Klinische Grebsforschung and Immutep; TY reports honoraria from Merck Sharp & Dohme, Ono Pharmaceutical, Bristol-Myers Squibb, Daiichi-Sankyo, AstraZeneca, TREUMO, Otsuka, Covidien, Johnson & Johnson, Olympus, and Intuitive; HYas reports research funding to their institution from Merck Sharp & Dohme, and honoraria from Chugai Pharma; MDB reports research funding to their institution from Merck Sharp & Dohme, honoraria from Bristol-Myers Squibb, Merck Sharp & Dohme, Novartis, Eli Lilly, and Servier, reimbursement for travel from Daiichi, and participation on an advisory board for Novartis; SL reports research funding to their institution from Amgen, Astellas, AstraZeneca, Bayer, Bristol-Myers Squibb, Daichii Sankyo, Hutchinson, Incyte, Merck Serono, Mirati, Merck Sharp & Dohme, Pfizer, Roche, and Servier, consulting fees from Amgen, AstraZeneca, Bristol-Myers Squibb, Daichii Sankyo, Incyte, Eli Lilly, Merck Serono, Merck Sharp & Dohme, Servier, and Astellas, and honoraria from Amgen, Bristol-Myers Squibb, Incyte, GlaxoSmithKline, Eli Lilly, Merck Serono, Merck Sharp & Dohme, Pierre-Fabre, Roche, Servier; JT reports consulting fees from Array Biopharma, AstraZeneca, Bayer, Boehringer Ingelheim, Cardiff Oncology, Chugai, Daiichi Sankyo, F Hoffman-La Roche, Genentech, HalioDX SAS, Hutchison MediPharma International, Ikena Oncology, Inspira, IQVIA, Eli Lilly, Menarini, Merck Serono, Merus, Merck Sharp & Dohme, Mirati, Neophore, Novartis, Ona Therapeutics, Orion Biotechnology, Peptomyc, Pfizer, Pierre Fabre, Samsung Bioepis, Sanofi, Scandion Oncology, Scorpion Therapeutics, Seattle Genetics, Servier Sotio Biotech, Taiho, Tessa Therapeutics, TheraMyc, and Tolremo Therapeutics, honoraria from HMP, Medscape Education, MJH Life Sciences, PeerView Institute for Medical Education, and Physicians Education Resource, and stock options in Oniria Therapeutics; EVC reports research funding to their institution from Amgen, Bayer, Boehringer Ingelheim, Bristol-Myers Squibb, Merck Sharp & Dohme, Merck KGaA, Novartis, Roche, and Servier, and fees for advisory board consulting for Abbvie, ALX, Amgen, Array, Astellas, AstraZeneca, Bayer, Beigene, Boehringer Ingelheim, Bristol Myers-Squibb, Daiichi, GlaxoSmithKline, Incyte, Ipsen, Eli Lilly, Merck Sharp & Dohme, Merck KGaA, Mirati, Novartis, Nordic, Pierre Fabre, Pfizer, Roche, Seattle Genetics, Servier, Takeda, Terumo, Taiho, and Zymeworks; YYJ reports research funding to their institution from Merck Sharp & Dohme, the National Cancer Institute, the US Department of Defense, Cycle of Survival, Fred's Team, Rgenix, Bayer, Roche, Bristol-Myers Squibb, and Eli Lilly, fees for advisory board participation from Rgenix, Merck Serono, Bristol-Myers Squibb, Eli Lilly, Pfizer, Bayer, Imugene, Merck Sharp & Dohme, Daiichi Sankyo, Zymeworks, SeaGen, Basilea Pharmaceutical, Astra Zeneca, and equity in Rgenix; XF, C-SS, and PB are employees of and own stock options in Merck Sharp & Dohme; D-YO reports research funding to their institution from AstraZeneca, Novartis, Array, Eli Lilly, Servier, Beigene, Merck Sharp & Dohme, and Handok; and Y-JB reports research funding to their institution from Merck Sharp & Dohme and fees for consulting from Astellas, Amgen, Samyang Biopharm, Hanmi, and Daewoong., (Copyright © 2024 Elsevier Ltd. All rights reserved.)

The updated edition of the German, Austrian and Swiss Guidelines for Systemic Treatment of Gastric Cancer was completed in August 2023, incorporating new evidence that emerged after publication of the previous edition. It consists of a text-based "Diagnosis" part and a "Therapy" part including recommendations and treatment algorithms. The treatment part includes a comprehensive description regarding perioperative and palliative systemic therapy for gastric cancer and summarizes recommended standard of care for surgery and endoscopic resection. The guidelines are based on a literature search and evaluation by a multidisciplinary panel of experts nominated by the hematology and oncology scientific societies of the three involved countries., (© 2023. The Author(s).)

Based on results of prior trials (TAGS, REGARD, RAINBOW), the combination of ramucirumab beyond progression with TAS-102 (trifluridine/tipiracil) seems to be promising in advanced esophagogastric adenocarcinoma (EGA). In this multicenter, non-randomized, open-label, investigator-initiated pilot trial, ramucirumab-pretreated patients with metastatic EGA received a maximum of 4 cycles of ramucirumab (8 mg/kg i.v. on day 1 and 15, Q2W) plus TAS-102 (35 mg/m 2 p.o. bid on day 1-5 and day 8-12; Q2W). Primary endpoint was tolerability and toxicity, defining a positive trial if the SAE rate according to CTCAE 5.0 will increase <30% (up to 55%) compared to historical results from TAGS trial (SAE rate 43%). Secondary endpoints were further evaluation of safety and assessment of efficacy according to tumor response and overall and progression-free survival (OS/PFS). Twenty patients, 20% gastric and 80% GEJ cancers and 55% with ECOG 0 were enrolled. In total, nine SAEs were reported in 25% [95% CI: 8.7-49.1] of the patients, all without relationship to the systemic therapy. The median OS and PFS were 9.1 months [5.4-10.1] and 2.9 months [1.7-4.8], respectively. In addition, a disease control rate of 45% was obtained. The trial showed a favorable safety profile with a numerically lower incidence of SAEs for the combination of ramucirumab with TAS-102 compared to historical TAGS trial. Furthermore, the combination demonstrated efficacy in the beyond progression setting and therefore warrants further evaluation in a randomized trial compared to TAS-102 alone., (© 2023 The Authors. International Journal of Cancer published by John Wiley & Sons Ltd on behalf of UICC.)

Background: Esophagogastric adenocarcinoma (EGA) presents a substantial global health challenge as the number of cases continues to rise. The current standard approach for treating localized EGA involves a combination of triplet chemotherapy, which consists of a platinum compound, a fluoropyrimidine, and a taxane (known as FLOT), followed by surgery. In cases of metastatic EGA with HER2-positive status or in certain studies with localized EGA, the use of HER2-targeted antibodies such as trastuzumab has shown improved responses. Recently, the addition of programmed cell death protein 1 (PD-1) inhibitors, such as pembrolizumab, when combined with 5-FU, platinum-based chemotherapy, and trastuzumab, has demonstrated significant enhancements in response rates for HER2-positive metastatic EGA. However, there is currently insufficient evidence regarding this treatment approach in localized HER2-positive disease., Methods: The PHERFLOT study is an open-label, single-arm, multicenter, exploratory phase II trial designed to assess the efficacy, safety, and tolerability of perioperative pembrolizumab, FLOT, and trastuzumab in patients with previously untreated localized HER2-positive EGA. In total, 30 patients will be recruited. The co-primary end points are pathological complete response rate and disease-free survival rate after 2 years. Secondary objectives include safety and tolerability, efficacy in terms of progression-free survival and objective response rate and translational markers, such as blood-based signatures (e.g., immune repertoire changes or emergence of anti-HER2 resistance variants) or microbiota signatures that may correlate with immune activation and therapy response., Discussion: Recent evidence from phase II clinical trials demonstrated improved efficacy through the addition of trastuzumab to perioperative FLOT. Furthermore, in advanced or metastatic EGA, the combination of trastuzumab, FLOT, and the PD1-inhibitor pembrolizumab significantly improved treatment response. The PHERFLOT study aims to assess the efficacy and safety of this treatment approach in HER2-positive-localized EGA, potentially identifying a promising new perioperative regimen for localized EGA, which then needs to be confirmed within a randomized trial. Furthermore, the accompanying translational program of the study might help to improve the stratification of suitable patients and to identify potential translational targets for future clinical trials., Clinical Trial Registration: https://clinicaltrials.gov, identifier NCT05504720., Competing Interests: AS reported grants from MSD during the conduct of the study; and institutional fees for advisory boards from BMS and MSD outside the submitted work. EG reported personal fees from BMS and MSD during the conduct of the study; and personal fees from Servier, Roche, and Sanofi outside the submitted work. TE reported grants from Servier, nonfinancial support from Ipsen, and personal fees from MSD, BMS, AstraZeneca, Roche, Eisai, Pierre Fabre, Merck Serono, and Bayer outside the submitted work. SA-B reported grants from BMS, MSD, Sanofi, Ipsen, Roche Hospira, Lilly, Vifor Pharma, Hospira, AstraZeneca, Immutep, and Eurozyto and personal fees from Lilly, AstraZeneca, and BMS outside the submitted work. MB reported grants from MSD covering the translational studies in this trial during the conduct of the study. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Tintelnot, Stein, Al-Batran, Ettrich, Götze, Grün, Haag, Heuer, Hofheinz, Homann, Bröring, Cruz, Kurreck, Lorenzen, Moosmann, Müller, Schuler, Siegler, Binder and Gökkurt.)

In colorectal cancers, the tumor microenvironment plays a key role in prognosis and therapy efficacy. Patient-derived tumor organoids (PDTO) show enormous potential for preclinical testing; however, cultured tumor cells lose important characteristics, including the consensus molecular subtypes (CMS). To better reflect the cellular heterogeneity, we established the colorectal cancer organoid-stroma biobank of matched PDTOs and cancer-associated fibroblasts (CAF) from 30 patients. Context-specific phenotyping showed that xenotransplantation or coculture with CAFs improves the transcriptomic fidelity and instructs subtype-specific stromal gene expression. Furthermore, functional profiling in coculture exposed CMS4-specific therapeutic resistance to gefitinib and SN-38 and prognostic expression signatures. Chemogenomic library screening identified patient- and therapy-dependent mechanisms of stromal resistance including MET as a common target. Our results demonstrate that colorectal cancer phenotypes are encrypted in the cancer epithelium in a plastic fashion that strongly depends on the context. Consequently, CAFs are essential for a faithful representation of molecular subtypes and therapy responses ex vivo., Significance: Systematic characterization of the organoid-stroma biobank provides a resource for context dependency in colorectal cancer. We demonstrate a colorectal cancer subtype memory of PDTOs that is independent of specific driver mutations. Our data underscore the importance of functional profiling in cocultures for improved preclinical testing and identification of stromal resistance mechanisms. This article is featured in Selected Articles from This Issue, p. 2109., (©2023 The Authors; Published by the American Association for Cancer Research.)

Background: Eftilagimod alpha (efti) is a major histocompatibility complex class II agonist activating antigen-presenting cells which leads to greater systemic type 1 T helper response and more cytotoxic CD8+ T-cell activation. This phase I trial evaluated the administration of efti, a soluble lymphocyte activation gene-3 (LAG-3) protein, combined with the anti-programmed death-ligand 1 (PD-L1) antibody avelumab in advanced solid tumors., Patients and Methods: Patients with heavily pretreated metastatic solid tumors received intravenous avelumab (800 mg) combined with subcutaneously administered efti (6 or 30 mg) for up to 12 cycles, followed by avelumab monotherapy. The primary endpoint was the assessment of the recommended phase II dose (RP2D) of efti in combination with avelumab., Results: Twelve patients with different tumor entities were enrolled (six patients in each cohort). During treatment, no dose-limiting toxicities occurred, and the severity of most adverse events was grade 1 or 2. In total, nine serious adverse events were documented, resulting in a fatal outcome in two cases, but none of them were assessed to be treatment related. Five patients (42%) achieved partial response. The median progression-free survival was 1.96 months and the median overall survival was not reached, with a 12-month survival rate of 75%., Conclusion: Subcutaneously administered efti plus avelumab was well tolerated, and efti of 30 mg was determined to be RP2D. The activity is promising and warrants further investigation in future phase II trials., (Copyright © 2023 The Authors. Published by Elsevier Ltd.. All rights reserved.)

This multicenter, randomized phase II/III study evaluated the addition of the vascular endothelial growth factor receptor-2 inhibitor ramucirumab to FLOT as perioperative treatment for resectable esophagogastric adenocarcinoma. Patients received either FLOT alone (Arm A) or combined with ramucirumab followed by ramucirumab monotherapy (Arm B). The primary endpoint for the phase II portion was the pathological complete or subtotal response (pCR/pSR) rate. Baseline characteristics were comparable between both arms with a high rate of tumors signet-ring cell component (A:47% B:43%). No between-arm difference in pCR/pSR rate was seen (A:29% B:26%), therefore the transition to phase III was not pursued. Nevertheless, the combination was associated with a significantly increased R0-resection rate compared with FLOT alone (A:82% B:96%; P = .009). In addition, the median disease-free survival was numerically improved in Arm B (A:21 months B:32 months, HR 0.75, P = 0.218), while the median overall survival was similar in both treatment arms (A:45 months B:46 months, HR 0.94, P = 0.803). Patients with Siewert type I tumors receiving transthoracic esophagectomy with intrathoracic anastomosis showed an increased risk of serious postoperative complications after ramucirumab treatment, therefore recruitment of those patients was stopped after the first-third of the study. Overall, surgical morbidity and mortality was comparable, whereas more non-surgical grade ≥ 3 adverse events were observed with the combination, especially anorexia (A:1% B:11%), hypertension (A:4% B:13%) and infections (A:19% B:33%). The combination of ramucirumab and FLOT as perioperative treatment shows efficacy signals, particularly in terms of R0 resection rates, for a study population with a high proportion of prognostically poor histological subtypes, and further evaluation in this subgroup seems warranted., (© 2023 UICC.)

Background: Paclitaxel in combination with ramucirumab is the standard of care second-line therapy in gastro-esophageal adenocarcinoma (GEA). As the number of taxane pretreated patients in the perioperative or first-line setting is increasing, it is unknown whether these patients benefit from re-applying a taxane in using the combination of paclitaxel and ramucirumab. Furthermore, the rates of neurotoxicity with first-line FOLFOX or FLOT range from 30%-70%, making second-line taxane-containing therapy less suitable to a meaningful portion of patients. This patient group is likely to benefit from a taxane-free second-line chemotherapy regimen, such as FOLFIRI and ramucirumab (FOLFIRI-Ram). Therefore, the RAMIRIS phase III trial evaluates the effects of the regimen of FOLFIRI-Ram in the second-line treatment after a taxane-based chemotherapy in patients with advanced GEA., Methods: The RAMIRIS trial is a randomized, open-label, multicenter phase II/III study comparing treatment of FOLFIRI-Ram (arm A) with paclitaxel and ramucirumab (arm B). The Phase II is already closed with 111 enrolled patients. In the phase III, 318 taxane-pretreated patients with advanced GEA will be recruited and randomized 1:1 to FOLFIRI (5-FU 2400 mg/m 2 over 46 h i.v., irinotecan 180 mg/m 2 i.v.; 5-FU 400 mg/m 2 bolus; leucovorin 400 mg/m 2 i.v.; on day 1 and 15, q28) with ramucirumab 8 mg/kg every two weeks (Arm A) or paclitaxel 80 mg/m 2 (days 1, 8, 15, q28) with ramucirumab 8 mg/kg every two weeks (Arm B). The primary endpoints are overall survival (OS) and objective overall response rate (ORR). Secondary endpoints are progression-free survival (PFS), disease control rate and safety and quality of life as assessed by EORTC-QLQ-C30 questionnaire., Discussion: The already completed RAMIRIS phase II demonstrated feasibility and efficacy of FOLFIRI-Ram. Especially docetaxel-pretreated patients seemed to markedly benefit from FOLFIRI-Ram, with favorable response- and PFS rates and lower toxicity. This offers a rationale for the phase III trial. If the RAMIRIS III trial transfers and confirms the results, they will affect the current treatment guidelines, recommending the combination therapy of FOLFIRI-Ram for taxane-pretreated patients with advanced GEA., Trial Registration: NCT03081143 Date of registration: 13.11.2015., (© 2023. The Author(s).)

Background: Gastric cancer (GC) is clinically heterogenous according to location (cardia/non-cardia) and histopathology (diffuse/intestinal). We aimed to characterize the genetic risk architecture of GC according to its subtypes. Another aim was to examine whether cardia GC and oesophageal adenocarcinoma (OAC) and its precursor lesion Barrett's oesophagus (BO), which are all located at the gastro-oesophageal junction (GOJ), share polygenic risk architecture., Methods: We did a meta-analysis of ten European genome-wide association studies (GWAS) of GC and its subtypes. All patients had a histopathologically confirmed diagnosis of gastric adenocarcinoma. For the identification of risk genes among GWAS loci we did a transcriptome-wide association study (TWAS) and expression quantitative trait locus (eQTL) study from gastric corpus and antrum mucosa. To test whether cardia GC and OAC/BO share genetic aetiology we also used a European GWAS sample with OAC/BO., Findings: Our GWAS consisting of 5816 patients and 10,999 controls highlights the genetic heterogeneity of GC according to its subtypes. We newly identified two and replicated five GC risk loci, all of them with subtype-specific association. The gastric transcriptome data consisting of 361 corpus and 342 antrum mucosa samples revealed that an upregulated expression of MUC1, ANKRD50, PTGER4, and PSCA are plausible GC-pathomechanisms at four GWAS loci. At another risk locus, we found that the blood-group 0 exerts protective effects for non-cardia and diffuse GC, while blood-group A increases risk for both GC subtypes. Furthermore, our GWAS on cardia GC and OAC/BO (10,279 patients, 16,527 controls) showed that both cancer entities share genetic aetiology at the polygenic level and identified two new risk loci on the single-marker level., Interpretation: Our findings show that the pathophysiology of GC is genetically heterogenous according to location and histopathology. Moreover, our findings point to common molecular mechanisms underlying cardia GC and OAC/BO., Funding: German Research Foundation (DFG)., Competing Interests: Declaration of interests MDR reports consulting fees from Roche Diagnostics and Medtronic; leadership or fiduciary role in the European Society of Gastrointestinal Endoscopy (ESGE) and World Endoscopy Organization (WEO). All other authors report no conflict of interest., (Copyright © 2023 The Authors. Published by Elsevier B.V. All rights reserved.)

Background: Pembrolizumab demonstrated durable clinical benefit and manageable safety in previously treated advanced or metastatic microsatellite instability-high (MSI-H)/mismatch repair deficient (dMMR) colorectal cancer (CRC) in the phase 2 KEYNOTE-164 study. Results from the final analysis are presented., Methods: Eligible patients had unresectable or metastatic MSI-H/dMMR CRC and ≥2 prior systemic therapies (cohort A) or ≥1 prior systemic therapy (cohort B). Patients received pembrolizumab 200 mg intravenously every 3 weeks for ≤35 cycles. The primary end-point was objective response rate (ORR) assessed per Response Evaluation Criteria in Solid Tumors, version 1.1 by blinded independent central review. Secondary end-points included duration of response (DOR), progression-free survival (PFS), overall survival (OS), and safety and tolerability., Results: Sixty-one patients in cohort A and 63 patients in cohort B were enroled; median follow-up was 62.2 months and 54.4 months, respectively. ORR was 32.8% (95% CI, 21.3%-46.0%) in cohort A and 34.9% (95% CI, 23.3%-48.0%) in cohort B. Median DOR was not reached (NR) in either cohort. Median PFS was 2.3 months (95% CI, 2.1-8.1) in cohort A and 4.1 months (95% CI, 2.1-18.9) in cohort B. Median OS was 31.4 months (95% CI, 21.4-58.0) in cohort A and 47.0 months (95% CI, 19.2-NR) in cohort B. No new safety signals were observed. Nine patients who initially responded experienced disease progression off therapy and received second-course pembrolizumab. Six patients (66.7%) completed an additional 17 cycles of pembrolizumab, and 2 patients achieved a partial response., Conclusions: Pembrolizumab continued to show durable antitumor activity, prolonged OS, and manageable safety in patients with previously treated MSI-H/dMMR CRC., Clinical Trial Registry Information: ClinicalTrials.gov, NCT02460198., Competing Interests: Conflict of interest statement The authors declare the following financial interests/personal relationships, which may be considered as potential competing interests: DTL reports honoraria from MSD; consulting or advisory roles for MSD, Bristol Myers Squibb, Nouscom, Janssen, G1 Therapeutics, and Merus; research funding from MSD, Bristol Myers Squibb, Aduro Biotech, Curegenix, Medivir, and Nouscom; and being listed as an inventor for a patent related to technology for mismatch repair deficiency for diagnosis and therapy (WO2016077553A1). LAD reports consulting or advisory roles for PetDx, Innovatus Capital Partners, Se’er, Delfi, Kinnate, and NeoPhore; equity interests in Epitope, Jounce Therapeutics, Thrive Detect, Se’er, Delfi, Kinnate, NeoPhore and PetDx; positions on the board of directors of Jounce Therapeutics and Epitope; intellectual property interests in multiple licensed patents related to technology for circulating tumour DNA analyses and mismatch repair deficiency for diagnosis and therapy; and a spouse with an equity interest in Amgen. TWK reports research funding from Roche/Genentech paid to his institution. EVC reports consulting or advisory roles for AbbVie, Array Pharma, Astellas, AstraZeneca, Bayer, BeiGene, Biocartis, Boehringer Ingelheim, Bristol Myers Squibb, Celgene, Daiichi Sankyo, Halozyme, GlaxoSmithKline, Incyte, Ipsen, Janssen Research, Lilly, MSD, Merck KGaA, Mirati, Novartis, Pierre Fabre, Roche, Seattle Genetics, Servier, Sirtex, Terumo, Taiho, TRIGR, and Zymeworks; and research funding from Amgen, Bayer, Boehringer Ingelheim, Bristol Myers Squibb, Celgene, Ipsen, Lilly, MSD, Merck KGaA, Novartis, Roche, and Servier paid to his institution. RGe reports honoraria from Medison, Roche, Janssen, MSD, and Pfizer; consulting or advisory roles for Eisai, AstraZeneca, Bayer, MSD, BOL Pharma, Ranium, JNJ, and Roche; travel and accommodation expenses from Takeda; a leadership role at Pyxis (Medical Lead); and equity interests in BOL Pharma and Pyxis Oncology. DJ reports honoraria from SKK Kliniken Heilbronn GmbH, Georg Thieme Verlag, Terrapinn, Touch Medical Media, BMS GmbH & Co, KGaA, MSD, Guppe 5 Fileproduktion GmbH, AstraZeneca GmbH, Department of Radiation Medicine, University of Kentucky, and The Norwegian Cancer Society Oslo; consulting or advisory roles for CureVac AG, Definiens, F. Hoffmann-La Roche, Genmab A-S, Life Science Inkubator GmbH, VAXIMM AG, OncoOne Research & Development GmbH, Oncolytics Biotech Inc., Zelluna, HDIT GmbH, AYOXXA, Seattle Genetics, BreakBio Corp., and Roche Pharma AG; expert testimony for courts, Wilhelm-Sander-Stiftung, Else Kröner-Fresenius-Stiftung, Schering Stiftung, and Nordforsk; a leadership role at BMS Stiftung Immunonkologie; and travel accommodation expenses from Amgen Inc, Oryx GmbH, Roche Glycart AG, Parexel.com, IKTZ HD GmbH, BMS. HH reports honoraria from Asahi Kasei, Bayer, Bristol Myers Squibb, Chugai, Daiichi Sankyo, Kyowa Hakko Kirin, Lilly, MSD Biopharma, MSD, Ono, Sanofi, Taiho, Takeda, and Yakult; consulting or advisory roles for Bristol Myers Squibb, Boehringer Ingelheim, Daiichi Sankyo, Dainippon Sumitomo Pharma, MSD, and Ono; and research grants from Amgen, Astellas, AstraZeneca, Bayer, BeiGene, Boehringer Ingelheim, Chugai, Daiichi Sankyo, Dainippon Sumitomo Pharma, Eisai, Incyte, Janssen, MSD Biopharma, MSD, Ono, and Taiho. MB reports honoraria, consulting or advisory roles, and travel and accommodation expenses for MSD. PK reports consulting or advisory roles for MSD and BMS; expert testimony for BMS; and research grant from MSD and BMS paid to his institution. TY reports honoraria from Taiho, Chugai, Eli Lilly, MSD Biopharma, Bayer, MSD, and Ono; and research grants from Taiho, Ono, Chugai, Amgen, Parexel International, Sanofi, Pfizer Japan, MSD, Genomedia Inc., Sysmex, Nippon Boehringer Ingelheim, and Daiichi Sankyo paid to his institution. RGu reports honoraria from Amgen, Servier, Roche, Ipsen, MSD and BMS; and advisory or consultancy for AAA Pharmaceutical, MSD, BMS, Servier, and P Fabre. HT reports honoraria from Taiho, Takeda, Chugai, Eli Lilly, and MSD Biopharma; and research funding from Taiho, Takeda, Chugai, and Daiichi-Sankyo paid to his institution. EE reports consulting or advisory roles for Amgen, Pierre Fabre, Bayer, MSD, F. Hoffmann-La Roche, Merck Serono, Organon, Sanofi, and Servier; and research grants from Amgen, Array Pharma, AstraZeneca, BeiGene, Boehringer Ingelheim, Bristol Myers Squibb, Celgene, Debiopharm, Genentech, HalioDx SAS, F. Hoffmann-La Roche, Hutchison, Janssen-Cilag, MedImmune, Menarini, Merck KGaA, MSD, Merus, Mirati, Novartis, Pfizer, PharmaMar, Sanofi Aventis, and Taiho; travel and accommodation expenses from Amgen, Bayer, F. Hoffman-La Roche, Merck Serono, MSD, Novartis, Organon, Pierre Fabre, Sanofi, and Servier; and non-remunerated activities with ASCO, ESMO, and SEOM. SEAB reports consulting or advisory roles for AstraZeneca, Bristol Myers Squibb, Daiichi Sankyo, Immutep, Lilly, and MSD; speaker bureau for Bristol Myers Squibb, Lilly, and MCI Deutschland GmbH; a leadership role at Institut für Klinische Krebsforschung IKF GmbH; equity interests in Institut für Klinische Krebsforschung IKF GmbH; and research funding from AstraZeneca, Bristol Myers Squibb, Celgene, Eurozyto, Hospira, Immutep, Lilly, Medac, Roche, and Vifor. PMB reports advisory and consulting roles for MSD, Pfizer, Bayer, Guardant Health, and Merrimack; and research grants from AbbVie, Boehringer Ingelheim, Ipsen, Processa, Taiho, MacroGenics, and Merck. YC and PL report employment by MSD, a subsidiary of Merck & Co., Inc., Rahway, NJ, USA. PM reports employment by and equity interests in MSD, a subsidiary of Merck & Co., Inc., Rahway, NJ, USA. TA reports honoraria from Amgen, AstraZeneca, Bristol Myers Squibb, GlaxoSmithKline, MSD, Pierre Fabre, Roche/Ventana, Sanofi, and Servier; consulting or advisory roles for Amgen, Aptitude Health, Astellas Pharma, Bristol Myers Squibb, GamaMabs Pharma, Gilead, Gritstone Oncology, MSD, Kaleido Biosciences, Pierre Fabre, Seagen, Servier, and Transgène; speaker’s bureaus for Bristol Myers Squibb, MSD, Seagen, and Servier; research funding from Bristol Myers Squibb and MSD; travel and accommodation expenses from MSD and Bristol Myers Squibb; and non-remunerated activities for the ARCAD Foundation and GERCOR Group. BON has declared no conflicts of interest., (Copyright © 2023. Published by Elsevier Ltd.)

Introduction: In metastatic colorectal cancer (mCRC), the efficacy of immune checkpoint blockade (ICB) has so far been limited to patients with microsatellite instability high tumors (MSI-H). Unfortunately, most mCRC patients suffer from non-immunogenic microsatellite stable (MSS) tumors. Therefore, new combinatorial strategies are urgently needed to enhance the immunogenicity of MSS tumors to finally increase the number of patients benefiting from ICB., Methods: The AVETUX trial aimed to combine the PD-L1 antibody avelumab with the standard of care chemotherapy combination FOLFOX and the anti-EGFR antibody cetuximab. Furthermore, we performed a central radiological review of the pre- and on-treatment computed tomography scans to better define the individual response to treatment., Results and Discussion: In total, 43 patients were treated of which 39 patients were confirmed as RAS/BRAF wildtype in central tissue review and finally response evaluated. A final progression-free survival (PFS) of 11.1 (range: 0.8 to 22.3 months) and a herein updated final overall survival (OS) of 32.9 months (range: 0.8 to 47.1 months) was reached. We observed a strong median depth of response of 67.5% tumor shrinkage and deepness of response correlated significantly with survival. On the other hand, early tumor shrinkage was not an indicator of better outcome at a cut-off of 20% (median values). In a next step, we correlated the individual best radiological response with potential ICB response biomarkers and found that the clonality and diversity, but not frequency of tumor infiltrating lymphocytes (TiLs) and peripheral blood mononuclear cells (PBMCs), strongly correlated with response. In summary, we report the final overall survival of the AVETUX trial and propose T cell clonality and diversity as a potential marker to predict response to chemo-immunotherapy combinations in MSS mCRC by performing a central radiological review., Clinical Trial Registration: ClinicalTrials.gov, identifier (NCT03174405)., Competing Interests: AS received institutional research grants from Merck, BMS, Roche, Sanofi, Servier and honoraria for lectures and advisory board meetings by Merck, Roche, Amgen, Lilly, Sanofi- Aventis, Servier, Bayer, BMS, MSD and Sirtex. S-EA-B has an advisory role with Merck, Roche, Celgene, Lilly, Nordic Pharma, Bristol- Myers Squibb, Astellas and MSD Sharp & Dohme; is a speaker for Roche, Celgene, Lilly, Nordic Pharma, AIO gGmbH, MCI, promedicis, Forum für Medizinische Fortbildung and Taiho pharma; he is CEO/founder of IKF Klinische Krebsforschung GmbH at Northwest Hospital; and has received research grants from Sanofi, Merck, Roche, Celgene, Vifor, Medac, Hospira, Lilly, Eurozyto, German Cancer Aid (Krebshilfe), German Research Foundation and the Federal Ministry of Education and Research. UP received institutional research grants from Celgene, BMS, Amgen, Lilly, Roche, Sanofi and Servier and honoraria for lectures and advisory board meetings by Roche, Celgene, Amgen, Lilly, Sanofi- Aventis, Servier, Bayer and BMS. AH received honoraria for lectures from Roche. CB received institutional research grants and honoraria for lectures and advisory board meetings from Merck, BMS, Roche, Sanofi, Servier, Bayer, BMS, Astrazeneca, Lilly, Mundipharma, Hexal, MSD and GSO. MBi received institutional research grants from Merck, BMS, Hexal, German Cancer Aid (Krebshilfe), German Research Foundation and the Federal Ministry of Education and Research as well as honoraria for lectures and advisory board meetings by Celgene, Janssen, Gilead, Merck, Roche, Amgen, Sanofi-Aventis and BMS., (Copyright © 2022 Tintelnot, Ristow, Sauer, Simnica, Schultheiß, Scholz, Goekkurt, von Wenserski, Willscher, Paschold, Lorenzen, Riera-Knorrenschild, Depenbusch, Ettrich, Dörfel, Al-Batran, Karthaus, Pelzer, Hinke, Bauer, Massa, Seliger, Wickenhauser, Bokemeyer, Hegewisch-Becker, Binder and Stein.)

Purpose: High pathologic complete response (pCR) rates and comparably good survival data were seen in a phase II trial combining perioperative fluorouracil, leucovorin, oxaliplatin, and docetaxel (FLOT) chemotherapy with trastuzumab for resectable, esophagogastric adenocarcinoma (EGA). The current trial evaluates the addition of trastuzumab and pertuzumab to FLOT as perioperative treatment for human epidermal growth factor receptor 2-positive resectable EGA., Methods: In this multicenter, randomized phase II/III trial, patients with human epidermal growth factor receptor 2-positive, resectable EGA (≥ clinical tumor 2 or clinical nodal-positive) were assigned to four pre- and postoperative cycles of either FLOT alone (arm A) or combined with trastuzumab and pertuzumab, followed by nine cycles of trastuzumab/pertuzumab (arm B). The primary end point for the phase II part was the rate of pCR., Results: The trial was closed prematurely, without transition into phase III, after results of the JACOB trial were reported. Eighty-one patients were randomly assigned (A: 41/B: 40) during the phase II part. The pCR rate was significantly improved with the trastuzumab/pertuzumab treatment (A: 12%/B: 35%; P = .02). Similarly, the rate of pathologic lymph node negativity was higher with trastuzumab/pertuzumab (A: 39%/B: 68%), whereas the R0 resection rate (A: 90%/B: 93%) and surgical morbidity (A: 43%/B: 44%) were comparable. Moreover, the inhouse mortality was equal in both arms (overall 2.5%). The median disease-free survival was 26 months in arm A and not yet reached in arm B (hazard ratio, 0.58; P = .14). After a median follow-up of 22 months, the median overall survival was not yet reached (hazard ratio, 0.56; P = .24). Disease-free survival and overall survival rates at 24 months were 54% (95% CI, 38 to 71) and 77% (95% CI, 63 to 90) in arm A and 70% (95% CI, 55 to 85) and 84% (95% CI, 72 to 96) in arm B, respectively. More ≥ grade 3 adverse events were reported with trastuzumab/pertuzumab, especially diarrhea (A: 5%/B: 41%) and leukopenia (A: 13%/B: 23%)., Conclusion: The addition of trastuzumab/pertuzumab to perioperative FLOT significantly improved pCR and nodal negativity rates at the price of higher rates of diarrhea and leukopenia.

Gastric adenocarcinoma and esophageal cancer are the fifth and seventh most common cancer types worldwide. At the time of initial diagnosis, up to 50% of esophagogastric cancers present with distant metastatic lesions and are candidates for chemotherapy. Curative surgery in this stage is still an experimental approach. Only a small number of these metastatic patients show an oligometastatic disease with no uniform definition of what oligometastatic means in gastric cancer. Nevertheless, the question remains unanswered as to whether these patients are still candidates for curative concepts. Some studies have attempted to answer this question but have not been adequately designed to address the role of a curative-intended multimodal therapy in this setting. The current FLOT-5 is designed to potentially provide a definitive answer to the question of whether curatively intended surgery plays a role or is a disadvantage in this setting.

Background: The evidence on the efficacy of anticancer therapy is limited in older patients with metastatic colorectal cancer (mCRC). This retrospective analysis of phase III FIRE-3 trial assesses the efficacy of FOLFIRI plus either cetuximab or bevacizumab according to the patients' age and sidedness of primary tumour., Methods: The study endpoints overall response rate (ORR), progression-free survival (PFS) and overall survival (OS) were compared between younger (<65 years) and older (≥65 years) patients, followed by stratification according to primary tumour sidedness. ORR was compared using Fisher´s exact test, OS and PFS were estimated by the Kaplan-Meier method and compared using the log-rank test. Univariate Cox regression analyses assessed hazard ratios and 95% confidence intervals for OS and PFS., Results: Overall, older patients with RAS WT tumours had a significantly shorter OS when compared to younger patients (25.9 months vs 29.3 months, HR 1.29; P = 0.02). Also the proportion of right-sided tumours was significantly greater in older patients (27.1% vs 17.9%; P = 0.029). Secondary resection rates were numerically higher in younger patients (25.4% vs. 17.6%, P = 0.068) than in older patients. This was primarily seen in the Cetuximab arm, where older patients underwent less likely resection (13.1% vs. 26%; P = 0.02). Older patients with left-sided tumours showed only a trend towards greater efficacy of cetuximab (HR 0.86; P = 0.38). In patients with right-sided primary tumours, older patients did not appear to benefit from cetuximab in contrast to younger patients (≥65 years: 16.6 months vs 23.6 months, HR 1.1; P = 0.87; <65 years: 21.9 months vs 16.4 months HR 1.5; P = 0.31)., Conclusions: In FIRE-3, OS was generally shorter in older patients in comparison to younger patients. This could be explained by the overrepresentation of right-sided tumours and a lower secondary resection rate in older patients. The efficacy of targeted therapy was dependent on tumour sidedness in older patients with RAS WT mCRC., Clinical Trial: FIRE-3 (NCT00433927)., (© 2022. The Author(s).)

Importance: In metastatic esophagogastric adenocarcinoma (EGA), the addition of programmed cell death 1 (PD-1) inhibitors to chemotherapy has improved outcomes in selected patient populations., Objective: To investigate the efficacy of trastuzumab and PD-1 inhibitors with cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) inhibitors or FOLFOX in first-line treatment of advanced ERBB2-positive EGA., Design, Setting, and Participants: This phase 2 multicenter, outpatient, randomized clinical trial with 2 experimental arms compared with historical control individually was conducted between March 2018 and May 2020 across 21 German sites. The reported results are based on a median follow-up of 14.3 months. Patients with previously untreated, metastatic ERBB2-positive (local immunohistochemistry score of 3+ or 2+/in situ hybridization amplification positive) EGA, adequate organ function, and eligibility for immunotherapy were included. Data analysis was performed from June to September 2021., Interventions: Patients were randomized to trastuzumab and nivolumab (1 mg/kg × 4/240 mg for up to 12 months) in combination with mFOLFOX6 (FOLFOX arm) or ipilimumab (3 mg/kg × 4 for up to 12 weeks) (ipilimumab arm)., Main Outcomes and Measures: The primary end point was survival improvement with a targeted increase of the 12-month overall survival rate from 55% (trastuzumab/chemotherapy-ToGA regimen) to 70% in each arm., Results: A total of 97 patients were enrolled, and 88 were randomized (18 women, 70 men; median [range] age, 61 [41-80] years). Baseline Eastern Cooperative Oncology Group performance status was 0 in 54 patients (61%) and 1 in 34 patients (39%); 66 patients (75%) had EGA localized in the esophagogastric junction and 22 in the stomach (25%). Central post hoc biomarker analysis (84 patients) showed PD-1 ligand 1 (PD-L1) combined positive score of 1 or greater in 59 patients (72%) and 5 or greater in 46 patients (56%) and confirmed ERBB2 positivity in 76 patients. The observed overall survival rate at 12 months was 70% (95% CI, 54%-81%) with FOLFOX and 57% (95% CI, 41%-71%) with ipilimumab. Treatment-related grade 3 or greater adverse events (AEs) and serious AEs occurred in 29 and 15 patients in the FOLFOX arm and in 20 and 17 patients in the ipilimumab arm, respectively, with a higher incidence of autoimmune-related AEs in the ipilimumab arm and neuropathy in the FOLFOX arm. Liquid biopsy analyses showed strong correlation of early cell-free DNA increase with shorter progression-free and overall survival and emergence of truncating and epitope-loss ERBB2 resistance sequence variations with trastuzumab treatment., Conclusions and Relevance: In this randomized clinical trial, trastuzumab, nivolumab, and FOLFOX showed favorable efficacy compared with historical data and trastuzumab, nivolumab, and ipilimumab in ERBB2-positive EGA. The ipilimumab arm yielded similar OS compared with the ToGA regimen., Trial Registration: ClinicalTrials.gov Identifier: NCT03409848.

Standard-of-care for resectable gastric/gastroesophageal junction cancer includes surgery and neoadjuvant-adjuvant 5-fluorouracil-leucovorin-oxaliplatin-docetaxel (FLOT) chemotherapy. Early-phase clinical studies support further clinical development of the immune checkpoint inhibitor (ICI); durvalumab, an anti-PD-L1 antibody, in patients with gastric/gastroesophageal junction cancer. Accumulating evidence indicates that ICIs combined with FLOT chemotherapy improve clinical outcomes in patients with advanced or metastatic cancer. We describe the rationale for and the design of MATTERHORN, a randomized, double-blind, placebo-controlled, phase III study investigating the efficacy and safety of neoadjuvant-adjuvant durvalumab and FLOT chemotherapy followed by adjuvant durvalumab monotherapy in patients with resectable gastric/gastroesophageal junction cancer. The planned sample size is 900 patients, the primary end point is event-free survival and safety and tolerability will be evaluated. Clinical trial registration: NCT04592913 (ClinicalTrials.gov).

Background: PD-1/PD-L1 inhibitors do not show activity in mismatch repair proficient (MMRp) colorectal cancer. Inhibition of C-C motif chemokine receptor 5 (CCR5) leads to an antitumoral activation of macrophages, affecting immune cell infiltrates. PICCASSO is a phase I trial exploring safety and efficacy of pembrolizumab and maraviroc in refractory MMRp CRC., Methods: Twenty patients received pembrolizumab and maraviroc (core period, eight cycles), followed by pembrolizumab monotherapy. Primary endpoint was the feasibility rate (patients without treatment-related grade ≥3 immune-related adverse events, treatment-related grade ≥4 adverse events, or any toxicity-related premature withdrawal of treatment). Secondary endpoints included safety/toxicity, overall response rate (ORR), progression-free survival (PFS), and overall survival (OS). Optional biopsies of liver metastases were performed for analyses of the micromilieu., Results: The feasibility rate was 94.7% [90% CI 77.4-99.7%], with one grade 4 hyperglycemia and no additional ≥ grade 3 treatment-related toxicities. ORR according to RECIST was 5.3%. Median PFS according to RECIST was 2.10 months [95%CI 1.68-2.30], median OS 9.83 months [95% CI, 5.59-20.02]. Disease control rate of poststudy salvage treatment was >70%. Translational analyses showed an increase of antitumoral chemokines during treatment; eotaxin, a chemokine involved in chemotaxis, was identified as a biomarker linked to OS., Conclusions: Therapy with pembrolizumab and maraviroc was feasible and showed a beneficial toxicity pattern. Clinical activity in MMRp CRC patients was limited with prolonged disease stabilizations observed in single patients. Efficacy of poststudy salvage treatment and OS was higher than expected in this heavily pretreated population. THIS TRIAL IS REGISTERED AT CLINICALTRIALS.GOV: NCT03274804., Competing Interests: Conflict of interest statement GMH received fees for an advisory role from Bristol-Myers Squibb, MSD Sharp & Dohme, EsoCap, Lilly and Novartis. He received speaker's honoraria from Servier, MSD Sharp & Dohme, Lilly, Targos, Bristol-Myers Squibb and Iomedico. He received research grants from Nordic Pharma, Taiho Pharmaceutical, MSD Sharp & Dohme. Travel and Accommodations were provided by Bristol-Myers Squibb, Lilly, Servier, MSD Sharp & Dohme. CS reports honoraria for advisory boards from Roche, MSD, Bayer, Servier, AstraZeneca and Eisai outside the submitted work. SAB has an advisory role with, Lilly, Bristol-Myers Squibb, MacroGenics, Immutep, and MSD Sharp & Dohme; he is a speaker for Bristol-Myers Squibb, Lilly, AIO Studien gGmbH, MCI Deutschland GmbH; he is CEO/founder of Institute of Clinical Cancer Research IKF at Northwest Hospital. He received research grants from Sanofi, Roche, Celgene, Vifor, Medac, Hospira, Lilly, Eurozyto, Immutep, Ipsen, Bristol-Myers Squibb, MSD Sharp & Dohme, AstraZeneca, German Cancer Aid (Krebshilfe), German Research Foundation and the Federal Ministry of Education and Research. DJ reports Consulting fees for advisory role from CureVac AG, Definiens, F. Hoffmann-La Roche Ltd, Genmab A-S, Life Science Inkubator GmbH, VAXIMM AG, OncoOne Research & Development Research GmbH, Oncoloytics Biotech Inc; he received payments or honoraria for lectures, presentations, speakers bureaus, manuscript writing or educational events from SKK Kliniken Heilbronn GmbH, Georg Thieme Verlag, Terrapinn, Touch Medical Media, BMS GmbH & Co KGaA, MSD; he received payment for expert testimony from Wilhelm-Sander Stiftung, Else-Kröner-Fesenius-Stiftung, Schering Stiftung, NordForsk and support for attending meetings and/or travel from Amgen Inc, Oryx GmbH, Roche Glycart AG, Parexel.com, IKTZ HD GmbH, BMS. He has a leadership or fiduciary role in BMS Stiftung Immunonkologie. NH holds a patent on the use of CCR5 inhibitors in cancer treatment, he received research grants from Bristol-Myers Squibb, DH Foundation, RR Pohl Foundation. He is a founder and stakeholder of Navitect Bio GmbH (CRO)., (Copyright © 2022 Elsevier Ltd. All rights reserved.)

Background: Ramucirumab and paclitaxel is the standard second-line therapy in patients with metastatic gastroesophageal adenocarcinoma. We report the efficacy and safety analyses of FOLFIRI and ramucirumab versus paclitaxel and ramucirumab after the failure of a platinum- and fluoropyrimidine-containing chemotherapy., Methods: This multicenter, investigator initiated, phase II trial randomised patients with gastroesophageal adenocarcinoma to either FOLFIRI plus ramucirumab (RAM) (arm A) or paclitaxel plus RAM (arm B). The primary end-point was 6-month overall survival (OS) rate, with a proportion of ≥65% in arm A considered a positive signal for further investigation., Results: 111 patients (65% of patients had prior docetaxel) were enrolled and 110 patients qualified for ITT population (arm A, 72; arm B, 38). The study did not meet the primary end-point for the comparison with historical control, as 6-month OS rate in the FOLFIRI plus RAM arm was 54% (95% CI 44-67). In between arm comparison, OS was similar (hazard ratio, HR 0.97 [95% CI 0.62-1.52]), while objective response rates (ORRs) and PFS were numerically better in arm A versus arm B (HR for PFS 0.73; ORR, 22% versus 11%). These differences were largely attributed to favourable efficacy results for arm A in docetaxel-pretreated patients (HR, 0.49; ORR, 25% versus 8%). In the safety population (n = 106), grade 3-5 adverse events were similar between arms (arm A, 75%; arm B, 68%)., Conclusion: The RAMIRIS trial demonstrated feasibility of FOLFIRI plus RAM. While the study was formally negative, it provided a signal to further investigate this combination for the group of patients with previous docetaxel therapy., Trial Registration: clinicaltrials.gov identifier: NCT03081143., Competing Interests: Conflict of interest statement SL reports personal fees from Amgen, AstraZeneca, Eli Lilly, Elsevier, Merck Serono, Merck Sharp & Dohme, Roche, Servier; PTP reports personal fees from AstraZeneca, Lilly, BMS, MSD Merck Serono, Roche, Pfizer, Servier outside the submitted work; EG reports personal fees from Amgen, Merck Sharp & Dohme, Roche, BMS; FL reports personal fees from Amgen, Astellas, AstraZeneca, Bayer, Biontech, Eli Lilly, Elsevier, Imedex, Infomedica, Iomedica, Medscape, MedUpdate, Merck Serono, Merck Sharp & Dohme, Oncovis, Promedicis, Roche, Springer Nature, StreamedUp!, and Zymeworks; grants and personal fees from BMS, outside the submitted work; MS reports personal fees from Amgen, Bristol-Myers Squibb, Lilly, Merck Serono, MSD Sharp & Dohme, Pfizer, Roche, Servier and Sanofi; PR reports honoraria from Bayer, Clinigen, BMS, Roche, MSD, and Deciphera for a position on advisory boards and received honoraria for speaking at symposia from Novartis, Pfizer, PharmaMar, Lilly, and Amgen; DP reports institutional fees from Roche (advisory role), Lilly (advisory role), PharmaMar (advisory role, lecture fee), Blueprint Medicines (lecture fee) and research grants from Lilly, PharmaMar, Novartis, Clinigen, BMS, EUSA Pharma, Roche, outside the submitted work; AH reports Honoraria for lectures from Roche; TOG reports advisory role with Lilly, MSD Sharp & Dohme, Bayer, Bristol-Myers Squibb, Roche and Servier; is a speaker for Lilly, MCI, MSD Sharp & Dohme, Roche and Servier; and has received research grants from AstraZeneca, Lilly, German Cancer Aid (Krebshilfe), German Research Foundation German Research Foundation (DFG) and Joint Federal Committee (Gemeinsamer Bundesausschuss). SA reports advisory role with, Lilly, Bristol-Myers Squibb, MacroGenics, Immutep, and MSD Sharp & Dohme; he is a speaker for Bristol-Myers Squibb, Lilly, AIO Studien gGmbH, MCI Deutschland GmbH; He is CEO/founder of Institute of Clinical Cancer Research IKF at Northwest Hospital. He received research grants from Sanofi, Roche, Celgene, Vifor, Medac, Hospira, Lilly, Eurozyto, Immutep, Ipsen, Bristol-Myers Squibb, MSD Sharp & Dohme, AstraZeneca, German Cancer Aid (Krebshilfe), German Research Foundation and the Federal Ministry of Education and Research. All other authors declare no competing interests., (Copyright © 2022 Elsevier Ltd. All rights reserved.)

VEGF inhibition in gastric cancer has a proven benefit in the second line setting. Pazopanib, an oral tyrosine kinase inhibitor, selectively inhibits VEGFR-1, -2 and -3, c-kit and PDGF-R resulting in inhibition of angiogenesis. This open-label randomized phase II trial (2:1) investigated the efficacy of combining pazopanib with FLO (5-fluorouracil, oxaliplatin) vs FLO alone (internal control arm) as first-line treatment in patients with advanced adenocarcinoma of the stomach and gastroesophageal junction (GEJ). Eighty-seven patients were randomized and 78 patients were eligible and evaluable (PaFLO arm 51 patients, FLO arm 27 patients). The PFS rate at 6 months (primary endpoint) was 34% in the PaFLO arm vs 30% in the FLO arm. Comparing PaFLO with FLO median PFS was 4.66 months (95% confidence interval [CI] 2.87-6.46) vs 4.47 months (95% CI 1.79-7.14) (95% CI, hazard ratio [HR] 0.96 (0.60-1.55), P = .882 [exploratory]); median OS was 10.19 months (95% CI 5.46-14.92) vs 7.33 months (95% CI 4.93-9.73), (95% CI HR 1.01 [0.62-1.65], P = .953, exploratory), disease control rate was 72% vs 59%. PaFLO was well tolerable, toxicities were slightly higher in the PaFLO arm. Major adverse events were loss of appetite, nausea, fatigue, diarrhea, neutropenia and thrombocytopenia. Adding pazopanib to chemotherapy shows signs of efficacy but no major improvement in this randomized phase 2 trial. The PFS at 6 months in both arms was lower than expected from the literature. Biomarkers identifying subgroups who benefit and novel combinations are needed. ClinicalTrials.gov: NCT01503372., (© 2021 The Authors. International Journal of Cancer published by John Wiley & Sons Ltd on behalf of UICC.)

Background: The main reason for treatment failure after curative surgical resection of gastric cancer is intra-abdominal spread, with 40-50% peritoneal seeding as primary localization of recurrence. Peritoneal relapse is seen in 60-70% of tumors of diffuse type, compared to only 20-30% of intestinal type. Hyperthermic IntraPEritoneal Chemoperfusion (HIPEC) is an increasingly used therapy method for patients with peritoneal metastases. The preventive use of HIPEC could represent an elegant approach for patients (pts) before macroscopic peritoneal seeding, since pts. with operable disease are fit and may have potential risk of microscopic involvement, thus having a theoretical chance of cure with HIPEC even without the need for cytoreduction. No results from a PCRT from the Western hemisphere have yet been published., Methods: This is a multicenter, randomized, controlled, open-label study including a total of 200 pts. with localized and locally advanced diffuse or mixed type (Laurens's classification) adenocarcinoma of the stomach and Type II/III GEJ. All enrolled pts. will have received 3-6 pre-operative cycles of biweekly FLOT (Docetaxel 50 mg/m 2 ; Oxaliplatin 85 mg/m 2 ; Leucovorin 200 mg/m 2 ; 5-FU 2600 mg/m 2 , q2wk). Pts will be randomized 1:1 to receive surgery only and postoperative FLOT (control arm) or surgery + intraoperative HIPEC (cisplatin 75 mg/m 2 solution administered at a temperature of 42 °C for 90 min) and postoperative FLOT (experimental arm). Surgery is carried out as gastrectomy or transhiatal extended gastrectomy. Primary endpoint is PFS/DFS, major secondary endpoints are OS, rate of pts. with peritoneal relapse at 2 and 3 years, perioperative morbidity/mortality and quality of life. The trial starts with a safety run-in phase. After 20 pts. had curatively intended resection in Arm B, an interim safety analysis is performed. Recruitment has already started and first patient in was on January 18th, 2021., Discussion: If the PREVENT concept proves to be effective, this could potentially lead to a new standard of therapy. On the contrary, if the outcome is negative, pts. with gastric cancer and no peritoneal involvement will not be treated with HIPEC during surgery., Trial Registration: The study is registered on June 25th, 2020 under ClinicalTrials.gov Identifier: NCT04447352 ; EudraCT: 2017-003832-35 ., (© 2021. The Author(s).)

Background: Platinum and fluoropyrimidine combinations typically comprise first-line (1L) therapy in advanced gastric cancer or gastroesophageal junction adenocarcinoma (G/GEA), although controversy exists regarding the use of 5doublet versus triplet cytotoxic regimens. Historically, second-line (2L) and third-line or later (3L+) therapy has been fragmented. Recent trials have increased the need for optimal treatment sequencing in advanced G/GEA., Materials and Methods: We conducted a systematic search of peer-reviewed manuscripts of randomized clinical trials examining 1L, 2L, and 3L+ therapy for advanced G/GEA published from 2009 through November 19, 2019. When available, overall survival, progression-free survival, time to progression, overall response rate, and toxicity were extracted from each and compared descriptively., Results: In 1L therapy, chemotherapy triplets demonstrated variable efficacy improvements with invariable increased toxicity compared with platinum/fluoropyrimidine doublets. Currently, the only published report of positive outcomes using biologics in 1L describes adding trastuzumab in HER2-overexpressing advanced G/GEA. In 2L, doublet chemotherapy regimens are not uniformly more efficacious than single-agent taxanes or irinotecan, and ramucirumab has demonstrated improved outcomes both as monotherapy and in combination., Conclusion: For advanced G/GEA, review of trial results from 2009-2019 support 1L therapy with platinum and fluoropyrimidine and sequencing with taxanes or irinotecan in combination with biologics as effective 2L options. Escalating to a triplet may add some efficacy at the expense of added toxicity., Implications for Practice: The rapidly changing treatment landscape for advanced gastric cancer includes increasing options for refractory disease. With multiple first-line platinum-based regimens, identification of those with the best benefit-to-risk ratio may provide guidance on treatment sequencing strategies. This article presents findings from the published literature of randomized controlled trials that included a first-line platinum/fluoropyrimidine combination and, for second-line trials, patients with platinum/fluoropyrimidine-refractory disease. This guiding summary could be a tool for clinicians to identify the optimal first-line regimen(s) followed by a strategy for subsequent regimens., (© 2021 ELI LILLY AND COMPANY. The Oncologist published by Wiley Periodicals LLC on behalf of AlphaMed Press.)

Perioperative chemotherapy with 5-fluorouracil, leucovorin, oxaliplatin and docetaxel (FLOT) is a mainstay in the treatment of esophagogastric adenocarcinomas (EGA). Trastuzumab improved survival when added to chemotherapy in patients with HER-2-positive metastatic EGA. We investigated the combination of trastuzumab and FLOT as perioperative treatment in patients with locally advanced EGA. A multicenter phase II study evaluated the efficacy and toxicity of perioperative FLOT (24-hours 5-FU 2600 mg/m 2 , leucovorin 200 mg/m 2 , oxaliplatin 85 mg/mg 2 , docetaxel 50 mg/m 2 , trastuzumab 6 mg/kg then 4 mg/kg d1, repeated d15 for four cycles preoperatively and postoperatively followed by 9 cycles of trastuzumab monotherapy) in patients with HER-2 positive EGA. Patients had ≥cT2, any N, M0 EGA. The primary endpoint was the rate of centrally assessed pathological complete response (pCR). Secondary endpoints comprised disease-free (DFS) and overall survival (OS), R0 resection rate, toxicity and surgical morbidity. Fifty-six evaluable patients (median age 62 years) were included; n = 40 had tumors originating from the esophagogastric junction; T stage was (cT2/3/4/unknown): 4/42/8/2; n = 50 patients had cN+ disease. Main adverse events grades 3-4: leukopenia (17.9%), neutropenia (46.6%) and diarrhea (17.0%). All patients underwent tumor resections. R0 resection rate was 92.9%. Eight patients had anastomotic leakage. One postoperative death occurred. pCR was found in 12 patients (21.4%) and a further n = 14 patients (25.0%) had near complete response. Median DFS was 42.5 months and the 3-year OS rate was 82.1%. The primary endpoint of achieving a pCR >20% was reached. No unexpected safety issues were observed. Survival data are promising., (© 2021 The Authors. International Journal of Cancer published by John Wiley & Sons Ltd on behalf of UICC.)

Background: In patients with microsatellite stable (MSS) metastatic colorectal cancer (mCRC), immune checkpoint blockade is ineffective, and combinatorial approaches enhancing immunogenicity need exploration., Methods: We treated 43 patients with predominantly microsatellite stable RAS/BRAF wild-type mCRC on a phase II trial combining chemotherapy with the epidermal growth factor receptor antibody cetuximab and the programmed cell death ligand 1 (PD-L1) antibody avelumab. We performed next-generation gene panel sequencing for mutational typing of tumors and liquid biopsy monitoring as well as digital droplet PCR to confirm individual mutations. Translational analyses included tissue immunohistochemistry, multispectral imaging and repertoire sequencing of tumor-infiltrating T cells. Detected PD-L1 mutations were mechanistically validated in CRISPR/Cas9-generated cell models using qRT-PCR, immunoblotting, flow cytometry, complement-dependent cytotoxicity assay, antibody-dependent cytotoxicity by natural killer cell degranulation assay and LDH release assay as well as live cell imaging of T cell mediated tumor cell killing., Results: Circulating tumor DNA showed rapid clearance in the majority of patients mirroring a high rate of early tumor shrinkage. In 3 of 13 patients expressing the high-affinity Fcγ receptor 3a (FcγR3a), tumor subclones with PD-L1 mutations were selected that led to loss of tumor PD-L1 by nonsense-mediated RNA decay in PD-L1 K162fs and protein degradation in PD-L1 L88S. As a consequence, avelumab binding and antibody-dependent cytotoxicity were impaired, while T cell killing of these variant clones was increased. Interestingly, PD-L1 mutant subclones showed slow selection dynamics reversing on avelumab withdrawal and patients with such subclones had above-average treatment benefit. This suggested that the PD-L1 mutations mediated resistance to direct antitumor effects of avelumab, while at the same time loss of PD-L1 reduced biological fitness by enhanced T cell killing limiting subclonal expansion., Conclusion: The addition of avelumab to standard treatment appeared feasible and safe. PD-L1 mutations mediate subclonal immune escape to avelumab in some patients with mCRC expressing high-affinity FcγR3a, which may be a subset experiencing most selective pressure. Future trials evaluating the addition of avelumab to standard treatment in MSS mCRC are warranted especially in this patient subpopulation., Trial Registration Number: NCT03174405., Competing Interests: Competing interests: AS received institutional research grants from Merck, BMS, Roche, Sanofi, Servier and honoraria for lectures and advisory board meetings by Merck, Roche, Amgen, Lilly, Sanofi-Aventis, Servier, Bayer, BMS, MSD and Sirtex. S-E A-B has an advisory role with Merck, Roche, Celgene, Lilly, Nordic Pharma, Bristol-Myers Squibb, Astellas and MSD Sharp & Dohme; is a speaker for Roche, Celgene, Lilly, Nordic Pharma, AIO gGmbH, MCI, promedicis, Forum für Medizinische Fortbildung and Taiho pharma; he is CEO/founder of IKF Klinische Krebsforschung GmbH at Northwest Hospital; and has received research grants from Sanofi, Merck, Roche, Celgene, Vifor, Medac, Hospira, Lilly, Eurozyto, German Cancer Aid (Krebshilfe), German Research Foundation and the Federal Ministry of Education and Research. UP received institutional research grants from Celgene, BMS, Amgen, Lilly, Roche, Sanofi and Servier and honoraria for lectures and advisory board meetings by Roche, Celgene, Amgen, Lilly, Sanofi-Aventis, Servier, Bayer and BMS. AH received honoraria for lectures from Roche. CB received institutional research grants and honoraria for lectures and advisory board meetings from Merck, BMS, Roche, Sanofi, Servier, Bayer, BMS, Astrazeneca, Lilly, Mundipharma, Hexal, MSD and GSO. MB received institutional research grants from Merck, BMS, Hexal, German Cancer Aid (Krebshilfe), German Research Foundation and the Federal Ministry of Education and Research as well as honoraria for lectures and advisory board meetings by Celgene, Janssen, Gilead, Merck, Roche, Amgen, Sanofi-Aventis and BMS., (© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

Background: Zolbetuximab plus first-line EOX (epirubicin, oxaliplatin, capecitabine; ZOL/EOX) significantly prolonged progression-free survival and overall survival in the FAST trial vs EOX alone. We report the patient-reported outcomes (PROs) of FAST in patients with advanced gastroesophageal adenocarcinoma., Methods: Patients were randomized to ZOL/EOX or EOX alone. Patients could receive ≤ 8 EOX cycles and remained on zolbetuximab until disease progression. PROs were collected using the EORTC QLQ-C30 and QLQ-STO22 before drug administration at day 1/cycle 1, day 1/cycle 5, end of EOX treatment, and q12w thereafter until disease progression. Time to deterioration (TTD), defined as the first meaningful worsening from baseline, in the individual QLQ-C30/QLQ-STO22 scores was analyzed. Longitudinal changes in scores from baseline were analyzed using a mixed-effects model for repeated measures (MMRM)., Results: The per protocol population included 143 (ZOL/EOX: 69; EOX: 74) patients. Baseline QLQ-C30 and STO22 scores were comparable between arms and denoted intermediate-to-high quality of life (QoL), intermediate-to-low global health status (GHS) and low symptom burden. Descriptive analyses showed no differences between arms until end of EOX but maintenance therapy with zolbetuximab was associated with better QoL and less symptom burden thereafter. TTD for most scores favored ZOL/EOX over EOX and reached statistical significance for GHS (p = 0.008). MMRM results support TTD findings; no statistically significant differences were observed between arms in any score except for nausea and vomiting (p = 0.0181 favoring EOX)., Conclusions: ZOL/EOX allowed patients to maintain good QoL and low symptom burden for longer than EOX alone.

Background: Claudin 18.2 (CLDN18.2) is contained within normal gastric mucosa epithelial tight junctions; upon malignant transformation, CLDN18.2 epitopes become exposed. Zolbetuximab, a chimeric monoclonal antibody, mediates specific killing of CLDN18.2-positive cells through immune effector mechanisms., Patients and Methods: The FAST study enrolled advanced gastric/gastro-oesophageal junction and oesophageal adenocarcinoma patients (aged ≥18 years) with moderate-to-strong CLDN18.2 expression in ≥40% tumour cells. Patients received first-line epirubicin + oxaliplatin + capecitabine (EOX, arm 1, n = 84) every 3 weeks (Q3W), or zolbetuximab + EOX (loading dose, 800 mg/m 2 then 600 mg/m 2 Q3W) (arm 2, n = 77). Arm 3 (exploratory) was added after enrolment initiation (zolbetuximab + EOX 1000 mg/m 2 Q3W, n = 85). The primary endpoint was progression-free survival (PFS) and overall survival (OS) was a secondary endpoint., Results: In the overall population, both PFS [hazard ratio (HR) = 0.44; 95% confidence interval (CI), 0.29-0.67; P < 0.0005] and OS (HR = 0.55; 95% CI, 0.39-0.77; P < 0.0005) were significantly improved with zolbetuximab + EOX (arm 2) compared with EOX alone (arm 1). This significant PFS benefit was retained in patients with moderate-to-strong CLDN18.2 expression in ≥70% of tumour cells (HR = 0.38; 95% CI, 0.23-0.62; P < 0.0005). Significant improvement in PFS was also reported in the overall population of arm 3 versus arm 1 (HR = 0.58; 95% CI, 0.39-0.85; P = 0.0114) but not in high CLDN18.2-expressing patients; no significant improvement in OS was observed in either population. Most adverse events (AEs) related to zolbetuximab + EOX (nausea, vomiting, neutropenia, anaemia) were grade 1-2. Grade ≥3 AEs showed no substantial increases overall (zolbetuximab + EOX versus EOX alone)., Conclusions: In advanced gastric/gastro-oesophageal junction and oesophageal adenocarcinoma patients expressing CLDN18.2, adding zolbetuximab to first-line EOX provided longer PFS and OS versus EOX alone. Zolbetuximab + EOX was generally tolerated and AEs were manageable. Zolbetuximab 800/600 mg/m 2 is being evaluated in phase III studies based on clinical benefit observed in the overall population and in patients with moderate-to-strong CLDN18.2 expression in ≥70% of tumour cells., Competing Interests: Disclosure US reports co-founder and shareholder at Ganymed and also holds several patents, with royalties paid by Astellas; founder, chief executive officer, and shareholder of BioNTech. OT reports founder and chief executive officer of Ganymed until the end of 2016; currently an employee and chief medical officer of BioNTech; patents for the investigational agent, zolbetuximab, with royalties paid by Astellas; consultancy fees from Astellas Pharma. FL reports personal fees and/or grants from Astellas, AstraZeneca, Bristol-Myers Squibb (BMS), BioNTech, Lilly, Elsevier, Infomedica, Merck, Merck Sharp & Dohme (MSD), Roche, Servier, and Amgen. BM reports honoraria from Angelini Pharma, Astellas, Bayer, BMS, Eliamm, Merck Serono, MSD, Novartis, Pfizer, Roche, and Sanofi. KW reports honoraria from Ganymed Pharmaceuticals. CH reports being a co-founder, supervisory board member, and shareholder of Ganymed Pharmaceuticals. Additionally, being a co-founder, supervisory board member, and shareholder of BioNTech SE, co-founder, advisor and former supervisory board member of TRON, board member to the cutting-edge technology cluster CI3, and president of the international cancer immunotherapy network CIMT. AA and JP report employment from Astellas. MS reports consultant fees from AstraZeneca, Boehringer Ingelheim, BMS, Novartis, Roche, and Takeda; honoraria from Abbvie, Boehringer Ingelheim, BMS, MSD, Novartis, and Pierre Fabre; research funding from AstraZeneca, Boehringer Ingelheim, BMS, and Novartis, and patents with the University Duisburg-Essen. S-EA reports advisory role from Merck, Roche, Celgene, Lilly, Nordic Pharma, BMS, MSD; speaker role from Roche, Celgene, Lilly, Nordic Pharma, AIO gGmbH, MCI, Promedicis, Forum für Medizinische Fortbildung; CEO/founder of IKF Klinische Krebsforschung GmbH; and clinical trial fees from Sanofi, Merck, Roche, Celgene, Vifor, Medac, Hospira, Lilly, German Cancer Aid (Krebshilfe), and German Research Foundation; and translational research from the Federal Ministry of Education and Research. All other authors have declared no conflicts of interest. Data sharing Researchers may request access to anonymised participant level data, trial level data, and protocols from Astellas sponsored clinical trials at www.clinicalstudydatarequest.com. For the Astellas criteria on data sharing see: https://clinicalstudydatarequest.com/Study-Sponsors/Study-Sponsors-Astellas.aspx., (Copyright © 2021. Published by Elsevier Ltd.)

Purpose: Pembrolizumab demonstrated efficacy in PD-L1-positive [combined positive score (CPS) ≥1] advanced gastric/gastroesophageal junction (G/GEJ) cancer in the first-, second-, and third-line setting in KEYNOTE-062, KEYNOTE-061, and KEYNOTE-059, respectively. To better delineate the specificity of CPS as a predictor of clinical outcomes, we analyzed pembrolizumab efficacy in patients with CPS ≥ 10 in these trials., Patients and Methods: Included were patients with CPS ≥ 10 tumors from KEYNOTE-059 cohort 1 (pembrolizumab, n = 46; post hoc ), KEYNOTE-061 (pembrolizumab, n = 53; chemotherapy, n = 55; post hoc ), and KEYNOTE-062 (pembrolizumab, n = 92; chemotherapy, n = 90; primary). Efficacy outcomes were overall survival (OS), progression-free survival (PFS), objective response rate (ORR), and duration of response (DOR)., Results: In KEYNOTE-059, median follow-up was 6 months, median OS was 8 months [95% confidence interval (CI), 5.8-11.1], ORR was 17%, and median (range) DOR was 21 months (3+ to 35+). In KEYNOTE-061, median follow-up was 9 months, median OS (pembrolizumab vs. chemotherapy) was 10 versus 8 months (HR, 0.64; 95% CI, 0.41-1.02), median PFS was 3 months versus 3 months (HR, 0.86; 95% CI, 0.56-1.33), ORR was 25% versus 9%, and median (range) DOR was not reached (4 to 26+ months) versus 7 months (3-7). In KEYNOTE-062, median follow-up was 11 months, median OS (pembrolizumab vs. chemotherapy) was 17 months versus 11 months (HR, 0.69; 95% CI, 0.49-0.97), median PFS was 3 months versus 6 months (HR, 1.09, 95% CI; 0.79-1.49), ORR was 25% versus 38%, and median (range) DOR was 19 months (1+ to 34+) versus 7 months (2+ to 30+)., Conclusions: This comprehensive analysis showed consistent improvements toward more favorable clinical outcomes with pembrolizumab across lines of therapy in patients with CPS ≥ 10 G/GEJ cancer., (©2021 American Association for Cancer Research.)

Few data exist on health-related quality of life (QoL) in patients with metastatic pancreatic cancer (mPC) receiving first-line chemotherapy (Awad L ZE, Mesbah M Boston, MA. Applying survival data methodology to analyze quality of life data, in Mesbah M, Cole BF, Ting Lee M-L (eds): Statistical Methods for Quality of Life Studies: Design, Measurements and Analysis. Kluwer Academic Publishers 2002). The QOLIXANE study is a prospective, noninterventional, multicenter substudy of the Platform for Outcome, Quality of Life and Translational Research on Pancreatic Cancer (PARAGON) registry, which evaluated QoL in patients with mPC receiving first-line gemcitabine and nab-paclitaxel chemotherapy in real-life setting. QoL was prospectively measured via EORTC QLQ-C30 questionnaires at baseline and every month thereafter. Therapy and efficacy parameters were prospectively collected. Main objectives were the rate of patients without deterioration of Global Health Status/QoL (GHS/QoL) at 3 and 6 months. Six hundred patients were enrolled in 95 German study sites. Median progression-free survival was 5.9 months (95% confidence interval [CI], 5.2-6.3). Median overall survival (OS) was 8.9 months (95% CI, 7.9-10.2), while median time to deterioration of GHS/QoL was 4.7 months (95% CI, 4.0-5.6). With a baseline GHS/QoL score of 46 (SD, 22.8), baseline QoL of the patients was severely impaired, in most cases due to loss in role functioning and fatigue. In the Kaplan-Meier analysis, 61% and 41% of patients had maintained GHS/QoL after 3 and 6 months, respectively. However, in the QoL response analysis, 35% and 19% of patients had maintained (improved or stable) GHS/QoL after 3 and 6 months, respectively, while 14% and 9% had deteriorated GHS/QoL with the remaining patients being nonevaluable. In the Cox regression analysis, GHS/QoL scores strongly predicted survival with a hazard ratio of 0.86 (P < .0001). Patients with mPC have poor QoL at baseline that deteriorates within a median of 4.7 months. Treatment with gemcitabine and nab-paclitaxel is associated with maintained QoL in relevant proportions of patients. However, overall, results remain poor, reflecting the aggressive nature of the disease., (© 2020 Union for International Cancer Control.)