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Background: Recent studies have shown a lower likelihood of locoregional recurrences in patients with low 21-gene recurrence score (RS). In this single institutional study, we investigated any associations between different cut-off values of 21-gene RS and histopathological factors and outcome in patients with long-term follow-up. Methods: Between February 2010 to February 2013, 61 patients with early stage clinically node-negative hormone receptor-positive and HER2-negative breast cancer tested for the 21-gene RS assay, were included into the study. Demographic, clinicopathological, treatment and outcome characteristics were analyzed.Results: Median age was 48 (range, 29-72). Of those, 53 patients were diagnosed with Stage 1 (86.9%) and 8 patients were Stage 2 (13.1%) following surgery. Patients with high histologic grade (HG), or with Ki-67>25%were more likely to have intermediate/high RS based on RS >11 and >18. Based on the 21-gene RS assay, only 19 patients (31%) received adjuvant chemotherapy. At a median follow-up of 112 months, 3 patients developed local recurrences (4.9%) treated with endocrine therapy alone. Among patients treated with endocrine treatment alone (n=42), the clinicopathological characteristics including age >20%, >25%, >30%), presence of lymphovascular invasion, luminal-A type, multifocality, lymph node positivity, tumor size more than 2 cm, RS>18 or RS>11 were not significantly found to be associated with 10-year locoregional recurrence free survival (LRRFS). However, patients with a RS >16 have significantly shown a poorer 10-year LRRFS compared to those with RS >16; 75%, p=0.039). Conclusions: These results suggest that Oncotpe DX assay may be of little value in patients with high histologic grade or high Ki67 scores (>25%) as treatment decision criteria to determine any benefit from chemotherapy. Furthermore, patients with a RS >16 are more likely to benefit from adjuvant chemotherapies, whereas those with a RS

PurposeNeoadjuvant chemotherapy(NACT) in gastroesophageal junction(GEJ) and gastric cancer(GC) was shown to improve survival in recent studies. We aimed to share our real-life experience of patients who received NACT in order to compare the efficacy and toxicity profile of different chemotherapy regimens in our country.Methods This retrospective multicenter study included locally advanced GC and GEJ cancer patients who received NACT, and had pathological response evaluation between 2007 and 2021. Relation between CT regimens and pathological evaluation were analyzed. Results A total of 728 patients from 45 oncology centers in Turkey were included. Median age at the time of diagnosis was 60 (range: 18-68). Most frequent NACT regimens used were FLOT (65%), DCF (18%) and ECF (8.1%), respectively. In the total study group pCR rate was 8.2%, R0 resection rate 88.5%, and D2 dissection rate was 66.8%. Rate of pCR and near-CR (26.4%), and R0 resection (92.6%) were higher in FLOT arm (p= 0.005 and ConclusionIn our real-life study, FLOT regimen has superior survival outcome despite worse toxicity profile. Clinicians should tailor treatment regimens according to patients’ multifactorial status and comorbidities for to obtain best outcomes.