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Although single-incision laparoscopic surgery (SILS) has gained some attention as a feasible alternative to conventional multiport laparoscopic surgery (MPLS) in colonic surgery, it became less prevalent than expected. Hence, we conducted this systematic review to evaluate the feasibility, safety, and oncological outcomes of single-incision laparoscopic colectomy (SILC) with meta-analysis and discussion of the future prospect of SILS. The search was conducted from September to October 2023 using PubMed and the Cochrane Central Register of Controlled Trials. Articles on colorectal cancer comparing SILC with multiport laparoscopic colectomy (MPLC) from all randomized controlled trials and comparative studies with 50 patients or more per arm were examined. The primary outcomes were the intra- and postoperative complication rates, and the secondary outcomes were the perioperative and oncological outcomes. The trends of the SILS number in Japan and the trends of the number of articles on SILS in PubMed were also reviewed. There were no significant differences in perioperative complication rates, operative factors, and oncological outcomes between SILC and MPLC, although heterogeneity was observed mainly in operative factors and the total length of the skin incision was significantly shorter in SILC. Therefore, SILC is technically and oncologically feasible and safe when performed by experienced laparoscopic surgeons. The case number of SILS was gradually increasing but the rate of SILS was decreasing in Japan. The number of articles on SILS was also decreasing. SILS has gained foothold to some extent but has plateaued. The emerging new robotic platform may reappraise the concept of SILS.

Abstract Aim To compare the effects of open (OG) and laparoscopic gastrectomy (LG) on body composition and muscle strength. Methods This study performed a propensity score matching analysis using cases from a large‐scale, multicenter, phase III randomized controlled trial concerning oral nutritional supplements after gastrectomy and analyzed both the whole and matched cohorts. Measurements of body composition and hand grip strength (HGS) were performed at baseline (preoperatively) and at 1, 2, 3, 6, and 12 months after gastrectomy. Results Of 835 patients, 275 and 560 underwent OG and LG, respectively. Skeletal muscle mass (SMM) and HGS loss were significantly lesser in the LG group than in the OG group. The propensity score‐matched analysis, including 120 pairs of patients, confirmed that the % SMM loss values at 1, 2, 3, 6, and 12 POM were −4.5%, −4.0%, −4.7%, −4.6%, and −5.8% in the OG group and −3.0%, −1.9%, −2.4%, −2.2%, and −2.7% in the LG group, respectively. The % SMM loss was significantly lesser in the LG group than in the OG group (repeated measures ANOVA p

Abstract Aim Postoperative small bowel obstruction (SBO) is one of the major complications that is mainly caused by postoperative adhesion. Recently, the antiadhesion membrane has become popular for postoperative SBO prevention. However, its efficacy is yet to be confirmed in the gastric cancer surgery field. Here, we conducted the supplemental analysis of the randomized controlled trial JCOG1001 to investigate the efficacy of the antiadhesion membrane on SBO prevention in patients with open gastrectomy for gastric cancer. Methods Of the 1204 patients enrolled in JCOG1001, 1200 patients were included. The development of SBO of Grade ≥ IIIa according to the Clavien–Dindo classification was recorded. Univariable and multivariable analyses were performed using the Fine and Gray model to determine the risk factors for SBO. Results Fifty‐one patients developed SBO (median follow‐up duration: 5.6 years). Total gastrectomy, combined resection, and blood loss significantly increased the risk for SBO development in the univariable analysis. Large amount of blood loss was independently associated with SBO development in the multivariable analysis (hazard ratio [HR], 3.089; 95% confidence interval [CI], 1.562–6.109, p = 0.0012). Antiadhesion membrane did not reduce the risk for SBO (HR, 1.299; 95% CI 0.683–2.470; p = 0.4246). In the patients belonging to subgroup analyses who received distal and total gastrectomy, the antiadhesion membrane was not associated with the incidence of SBO. Conclusions Antiadhesion membrane did not decrease SBO occurrence rate after open gastrectomy. Therefore, the use of antiadhesion membrane would not be effective for preventing SBO in gastric cancer surgery.

Write failure (WF) is a major reliability issue for applications of magnetoresistive random access memory (MRAM), and much effort has been devoted to reducing the write error rate (WER), which is the probability of write failures of a memory cell. Recently, it was shown that the WER of MRAM obeys a skewed probability distribution even though the variation in material parameters obeys a normal distribution. However, little is known about the effect of WER distribution on WF in a memory cell array. Here, we study WF in a memory cell array consisting of magnetic tunnel junction elements with distributed WERs based on numerical simulations. We simulated Bernoulli trials of writing, assuming that the WER obeys a beta distribution. The results show that for typical writing patterns, WF in a memory cell array obeys a binomial distribution, with the mean of the WER as the probability of success. The statistical properties of WF in a memory cell array are not affected by the variance and skewness of the WER. The results provide a basic understanding of the statistical properties of WF in a memory cell array and will be useful for the development of computing systems that exploit erroneous memories.

Abstract Background and Aims Critically ill patients with liver failure have high mortality. Besides the management of organ‐specific complications, liver transplantation constitutes a definitive treatment. However, clinicians may hesitate to introduce mechanical ventilation for patients on liver transplantation waitlists because of poor prognosis. This study investigated the outcomes of intensive care and ventilation support therapy effects in patients with liver failure. Methods This single‐center study retrospectively enrolled 32 consecutive patients with liver failure who were admitted to the intensive care unit from January 2014 to December 2020. The medical records were reviewed and analyzed retrospectively for Acute Physiologic and Chronic Health Evaluation (APACHE)‐II. The model for end‐stage liver disease scores, 90‐day mortality, and survival was assessed using the Kaplan–Meier method. Results The average patient age was 45.5 ± 20.1 years, and 53% of patients were women. On intensive care unit admission, APACHE‐II and model for end‐stage liver disease scores were 20 and 28, respectively. Among 13 patients considered for liver transplantation, 4 received transplants. Thirteen patients (40.6%) were intubated and mechanically ventilated in the intensive care unit. The 90‐day mortality rate of patients with and without mechanical ventilation in the intensive care unit (13, 61.5% vs. 19, 47.4%, p = 0.4905) was similar. APACHE‐II score >21 was an independent predictor of mechanical ventilation requirement in patients with liver failure during intensive care unit stay. Conclusion Although critically ill patients with liver failure are at risk of multiorgan failure with poor outcomes, mechanical ventilation did not negatively affect the 90‐day mortality or performance rates of liver transplantation. Clinicians should consider mechanical ventilation‐based life support in critically ill patients with liver failure who are awaiting liver transplantation.

Abstract Background Recent developments in the field of companion diagnosis and molecular-targeting therapeutic agents have helped in developing treatments targeting human epidermal growth factor receptor 2 (HER2) in gastric cancer (GC) and esophagogastric junction cancer (EGJC), and the importance of accurate diagnosis of HER2 expression is increasing. However, the HER2-positivity rate significantly differs among reports in GC and EGJC, and factors that affect HER2-positivity require elucidation. Methods The present study retrospectively examined factors related to HER2-positivity in a single institution, including age, sex, body mass index, the American Society of Anesthesiologists physical status, tumor information, and surgery information, including time to specimen processing. Results Our study included 165 patients tested for HER2 using GC and EGJC surgery specimens among the 1,320 patients who underwent gastrectomy from January 2007 to June 2022. In total, 35 (21.2%) and 130 (78.8%) patients were HER2-positive and -negative, respectively. Multivariate analysis revealed that intestinal type (odds ratio [OR]: 3.41, 95% confidence interval [CI]: 1.44–8.09, p = 0.005), pM1 (OR: 3.99, 95% CI: 1.51–10.55, p = 0.005), and time to specimen processing of

Small-angle scattering (SAS) is a powerful tool for the detailed structural analysis of objects at the nanometer scale. In contrast to techniques such as electron microscopy, SAS data are presented as reciprocal space information, which hinders the intuitive interpretation of SAS data. This study presents a workflow: (1) creating objects, (2) 3D scanning, (3) the representation of the object as point clouds on a laptop, (4) computation of a distance distribution function, and (5) computation of SAS, executed via the computer program Phone2SAS. This enables us to realize SAS and perform the interactive modeling of SAS of the object of interest. Because 3D scanning is easily accessible through smartphones, this workflow driven by Phone2SAS contributes to the widespread use of SAS. The application of Phone2SAS for the structural assignment of SAS to Y-shaped antibodies is reported in this study.

Objectives: In elderly colorectal cancer (CRC) patients, preoperative surgical indications can be controversial in some cases depending on the patient's physical condition. In comparison with younger patients, both cancer-specific survival (CSS) and non-CCS (NCSS) have an impact on the prognosis and both CSS and NCSS should be considered in the preoperative assessment. We aimed to investigate the impact of body mass index (BMI) on CSS and NCSS in Japanese elderly CRC patients. Methods: We retrospectively collected data from 471 Japanese elderly patients (80 years) with stage I-III CRC who underwent curative surgery from 1998 to 2017. A Kaplan-Meier survival analysis with propensity score matching (PSM) and a multivariate Cox regression analysis were performed. Results: After PSM, 123 higher BMI (23) and 123 lower BMI (

Abstract Hepatic hemangioma is the most common benign solid lesion of the liver. Contrast-enhanced computed tomography or magnetic resonance imaging is recommended for definitive diagnosis of hepatic hemangioma. However, these modalities have drawbacks in terms of radiation exposure, invasiveness, and high cost for examination. “Fluttering sign” is one of the candidate findings considered specific for hepatic hemangioma that can be useful for diagnosis of hepatic hemangioma using grayscale US alone. However, the assessment is subjective and the findings are weak and likely to be overlooked in some cases. We developed a software program, Fluctuational Imaging, for objective detection and depiction of “fluttering sign”. Here, we evaluated the ability of Fluctuational Imaging software to depict “fluttering sign” in hepatic hemangioma. Presence or absence of “fluttering sign” was evaluated in the grayscale US videos and Fluctuational Imaging software analysis results of patients with hepatic hemangioma. The Cohen’s kappa test showed very good agreement (0.95). Fluctuational Imaging software can detect and depict the phenomenon of “fluttering sign” well and may be a useful tool for diagnosis of hepatic hemangioma.

Intussusception in adults is rare and usually associated with organic lesions. However, in the current era of computed tomography (CT), cases of idiopathic and transient intussusceptions are being increasingly diagnosed. Herein, we present a case of ileocecal intussusception with symptoms mimicking those of acute coronary syndrome. A male patient in his 80s with a history of myocardial infarction presented to the emergency department with acute onset of severe precordial and epigastric pain, cold sweating, and vomiting. Coronary angiography did not reveal any significant new lesion, while abdominal CT revealed ileocecal intussusception without bowel obstruction. The pain spontaneously subsided without any intervention, and the patient was discharged on the sixth hospital day. Cases of intussusception may go unnoticed in patients suspected of having chest pain with a normal coronary arteriogram, as idiopathic intussusception is relatively common and subsides spontaneously. Therefore, physicians should note that intussusception is one of the differential diagnoses of acute coronary syndrome.

Intravascular large B-cell lymphoma, an extranodal large B-cell lymphoma, is a rare hematological malignancy with only a few reports of lung involvement. We report a case of intravascular large B-cell lymphoma with acute hypoxic respiratory failure and interstitial lung disease diagnosed via random skin biopsies. A 54-year-old woman presented with fever, cough, and dyspnea. Computed tomography imaging revealed findings concerning interstitial lung disease. The patient’s respiratory status worsened despite the treatment with antibiotics and steroids. Generalized edema and thrombocytopenia also developed. Intravascular large B-cell lymphoma was clinically suspected and ultimately diagnosed by skin biopsy, although she had no apparent skin lesions. The patient’s condition considerably improved after chemotherapy. Intravascular large B-cell lymphoma should be considered in patients with acute respiratory failure and interstitial lung lesions.

Abstract An organic ligand-free aqueous-phase synthesis of copper (Cu) nanoparticles (NPs) under an air atmosphere was successfully achieved by reducing copper(II) oxide particles with a leaf-like shape in the presence of Ni salts at room temperature. The resulting Cu NPs with a mean particle diameter of ca. 150 nm exhibited low-temperature sintering properties due to their polycrystalline internal structure and ligand-free surface. These Cu NPs were applied to obtain Cu NP-based nanopastes with low-temperature sintering properties, and the resistivities of the obtained Cu electrodes after annealing at 150 °C and 200 °C for 30 min were 64 μΩ∙cm and 27 μΩ∙cm, respectively. The bonding strength between oxygen-free Cu plates prepared using the Cu NP-based nanopastes reached 32 MPa after pressure-less sintering at 260 °C for 30 min under a nitrogen atmosphere. The developed manufacturing processes using the developed Cu nanopastes could provide sustainable and low-CO2-emission approaches to obtain Cu electrodes on flexible films and high-strength bonding between metal plates as die-attach materials for power devices under energy- and resource-saving conditions.

Abstract Aim Post‐surgical weight loss influences chemotherapy compliance and may be a risk factor for survival. Intake of an oral elemental nutritional supplement (OENS) can reduce weight loss after gastric cancer (GC) surgery. We assessed whether therapy completion levels would increase in patients receiving postoperative adjuvant chemotherapy in combination with an OENS. Methods This was a multicenter, open‐label, single‐arm, phase II study in GC patients who underwent curative total or distal gastrectomy (TG/DG) and received adjuvant S‐1 chemotherapy. The primary endpoint was the S‐1 completion rate for 1 year with a relative performance (RP) value of ≥70%; secondary endpoints included factors affecting the completion rate of S‐1, RP value after eight S‐1 courses, S‐1 and OENS persistence rates, nutritional index, OENS compliance, and safety. Results In 71 efficacy‐evaluable patients, the S‐1 completion rate was 69.0% (TG, 68.0%; DG, 69.6%) and the RP value was 87.5 (TG, 89.1; DG, 87.5). Over eight treatment courses, median persistence rates were 89.0% for S‐1 and 93.8% for the OENS. The mean OENS compliance was 81.8% at the fourth S‐1 course and 52.9% at the eighth course. The incidence of Grade 3 or 4 adverse events was 27.2%, most commonly neutropenia (12.3%). Conclusions The completion rate of S‐1 for 1 year in patients who could take the OENS exceeded the pre‐defined threshold level. Randomized controlled trials are warranted to confirm the role of OENS in adjuvant chemotherapy.

Abstract Aim Osteoporosis in patients after gastrectomy is increasing with the aging of gastric cancer patients. Bisphosphonates are effective treatments for osteoporosis; however, their safety or efficacy in postgastrectomy patients has not been established. The purpose of this multicenter prospective intervention study was to investigate the impact of monthly minodronate on osteoporosis after gastrectomy. Methods Of the 261 enrolled gastric cancer patients, 164 patients were diagnosed with osteoporosis based on criteria of the Japan Society of Osteoporosis. They were randomly assigned 1:1 to groups treated with active vitamin D (VD group) or monthly minodronate (MIN group). The primary endpoint was changes in lumbar bone mineral density (L‐BMD) 12 mo after the start of administration. The secondary endpoints were changes in bone metabolism markers, adverse events (AEs), or treatment completion rates. Results There was no significant difference in patient background between the VD (n = 82) and MIN (n = 82) groups. In the MIN group, the increase in L‐BMD was significantly higher than that in the VD group (4.52% vs 1.72%, P = .001), with a significant reduction in bone metabolism markers; blood NTX (−25.6% vs −1.6%, P

Abstract Background Fibrolamellar hepatocellular carcinoma (FL-HCC) is a liver tumor that occurs almost exclusively in young adults without underlying liver disease. In spite of its distinct clinical characteristics and specific imaging findings, preoperative diagnosis is often difficult due to the extremely low incidence of the tumor. Although FL-HCC shows particular morphological features on H&E-stained tissue sections, differential diagnosis from ordinary HCC, especially the scirrhous variant of HCC, and intrahepatic cholangiocarcinoma needs additional immunohistochemical (IHC) analyses and/or molecular genetic testing. Case presentation A 21-year-old male patient was referred to our hospital for further evaluation of a large liver mass. Abdominal ultrasound examination, contrast-enhanced computed tomography, and magnetic resonance imaging revealed a well-defined hypervascular lobulated liver mass, 11 × 11 cm in diameter, with a central scar and calcification, in segments 5/8. Under the diagnosis of FL-HCC, we carried out extended anterior sectorectomy, including a part of segment 4. On microscopic examination, the tumor was composed of proliferating polygonal cells with abundant eosinophilic granular cytoplasm containing nuclei with vesicular chromatin and enlarged nucleoli, in an abundant stroma. Collagen fibers arranged in a parallel lamellar pattern were seen in the tumor stroma. These findings, together with the results of subsequent IHC analyses using HAS, CK7, and CD 67, we made the diagnosis of FL-HCC, which was further confirmed by detection of the DNAJB1-PRKACA fusion gene in the tumor cells by RT-PCR. Conclusion FL-HCC shows distinct imaging appearances. Although it also has characteristic morphological features, combined use of IHC and/or molecular genetic studies are necessary for the final diagnosis.

Abstract Background Paraduodenal hernia is a rare internal hernia which accounts for only 1% of all intestinal hernias. There have been limited reported cases of paraduodenal hernia treated by laparoscopic surgery. We report a case of left paraduodenal hernia that was successfully treated by single-incision laparoscopic surgery (SILS). Case presentation A 17-year-old woman presented with left upper abdominal pain. An abdominal enhanced multi-detector computed tomography demonstrated encapsulated cluster of small bowel loops in the left upper quadrant which passed through the dorsal side of the inferior mesenteric vein, and showed that blood flow of the prolapsed small bowel was preserved. We preoperatively diagnosed left paraduodenal hernia without ischemia or necrosis. We performed elective SILS because she was a young actress training school student and cosmetic benefit was thought to be important. We pulled out the protruded small bowel and closed a defect with a running suture by SILS. The patient was discharged 3 days after the surgery with no complications. Conclusions We reported the case of left paraduodenal hernia successfully diagnosed and treated by SILS.

Antibody aggregation, followed by acid denaturation and neutralization of pH, is one of the reasons why the production of therapeutic monoclonal antibodies (mAbs) is expensive. Determining the structural details of acid-denatured antibodies is important for understanding their aggregation mechanism and for antibody engineering. Recent research has shown that monoclonal antibodies of human/humanized immunoglobulin G1 (IgG1) become smaller globules at pH 2 compared to their native structure at pH 7. This acid-denatured species is unstable at pH 7 and prone to aggregation by neutralization of pH. Small-angle X-ray scattering (SAXS) data have revealed an acid-induced reduction in the subpeaks in Kratky plot, indicating conformational changes that can lead to aggregation. The subpeaks are well resolved at pH > 3 but less pronounced at pH ≤ 2. One of the weakened subpeaks indicates loosely organized inter-region (Fab-Fab and Fab-Fc) correlations due to acid denaturation. However, the structural origin of the other subpeak (called q3 peak in this study) has not been established because its q region could represent the various inter-region, inter-domain, and intra-domain correlations in IgG1. In this study, we aimed to untangle the effects of domain–domain correlations on Kratky’s q3 peak based on the computed SAXS of the crystal structure of IgG1. The q3 peak appeared in the static structure and was more prominent in the Fc region than in the Fab or isolated domains. Further brute-force analysis indicated that longer domain–domain correlations, including the inter-region, also positively contribute to Kratky’s q3 peak. Thus, the distortion of the Fc region and a longer inter-region correlation initiate acid denaturation and aggregation.

This article presented the small-angle X-ray scattering (SAXS) data of a guanine-rich DNA derived from the promoter region of c-MYC gene (Pu22) in solution. The data is collected under the condition, where the Pu22 takes a guanine quadruplex (GQ) structure. The SAXS curve was also measured and analyzed when 18-crown-6, a chelator of K+ ions, was added to the Pu22 solution.

We added a comment to the the article by Kim et al.. We first described how the hazard function and commonly used survival function act complementary, although these two functions are mathematically equivalent. Then, we pointed out two notable findings of the present article: 1) a recurrence by metastasis is presumed to occurred constantly at an annualized incidence of 4%-10% until 6 postoperative years; and 2) the annualized recurrence rates between the 5th and 10th postoperative years were between 3%-10% in cirrhotic patients and this figure was comparable to or even lower than the reported annual incidence of HCC in cirrhotic patients (up to 8%). We also pointed out three issues to be paid attention for: 1) the authors amalgamated patients with HBV- and HCV-related HCC together when calculating the hazard function, although the background liver of HCV-related HCC is hypothesized to have a higher carcinogenetic activity than that of HBV-related HCC, at least during the era before the advent of direct-acting antivirals; 2) the authors would have obtained interesting results had they evaluated the risk factors for late-phase recurrence exclusively in patients with HBV infection, including HBV-specific covariates into the analysis; and 3) many investigators may confuse a pathogenic factor with its surrogate marker when interpreting the significance of fibrosis in studies investigating risk factors leading to HCC development.

Abstract Background Percutaneous transhepatic gallbladder drainage (PTGBD) is indicated for patients with acute cholecystitis (AC) who are not indicated for urgent surgery, but external tubes reduce quality of life (QOL) while waiting for elective surgery. The objective of the present study was to investigate the feasibility of laparoscopic cholecystectomy after endoscopic trans-papillary gallbladder stenting (ETGBS) comparing with after PTGBD. Methods Intraoperative and postoperative outcomes of patients with ETGBS and PTGBD were retrospectively compared. Results Eighteen ETGBS and ten PTGBD patients were compared. Differences in the duration of ETGBS and PTGBD [median 209 min (range 107–357) and median 161 min (range 130–273), respectively, P = 0.10], median blood loss [ETGBS 2 (range 2–180 ml) and PTGBD 24 (range 2–100 ml), P = 0.89], switch to laparotomy (ETGBS 11% and PTGBD 20%, P = 0.52), and median postoperative hospital stay [ETGBS 8 (range 4–24 days) and ETGBS 8 (range 4–16 days), P = 0.99]. Thickening of the cystic duct that occurred in 60% of the ETGBS patients and none of the PTGBD patients (P = 0.005) interfered with closure of the duct by clipping. No obstruction occurred in ETGBS patients. Conclusion ETGBS did not make laparoscopic cholecystectomy less feasible than after PTGBD. This is a pilot study, and further investigations are needed to validate the results of the present study.

Objectives: In the 9th edition of the Japanese Classification of Colorectal, Appendiceal, and Anal Carcinoma (JCCRC), ovarian metastasis is classified as distant metastasis. We assessed the significance of resection of ovarian metastases and the validity of this 9th edition of JCCRC for ovarian metastases from colorectal cancer (CRC). Methods: We retrospectively analyzed the clinicopathological factors and overall survival of 17 patients with ovarian metastases from CRC who underwent resection and 110 female CRC patients with Stage IV (M1a) disease. Results: The patients with only ovarian metastases who underwent resection had a longer median survival time than patients with both ovarian and peritoneal metastases who underwent resection (45.4 months vs. 9.3 months, P = 0.029). The 5-year overall survival of the patients with only ovarian metastases who underwent R0 resection was as long as that of the female Stage IV (M1a) CRC patients after R0 resection (50% vs. 48%, P = 0.334). Conclusions: We found that, after resection, patients with only ovarian metastases had significantly better prognoses than patients with ovarian and peritoneal metastases. R0 resection of ovarian metastasis indicated as good prognosis as R0 resection of metastasis to one distant organ without ovaries. So the 9th edition of JCCRC, which classifies ovarian metastasis from CRC as distant metastasis, is appropriate.

Abstract Aim We previously reported in a randomized controlled trial that Billroth I and Roux‐en‐Y reconstructions were generally equivalent regarding body weight change and nutritional status 1 year after distal gastrectomy for gastric cancer. We describe the long‐term follow‐up data 5 years after distal gastrectomy. Methods We analyzed consecutive gastric cancer patients who were randomly assigned to undergo Billroth I or Roux‐en‐Y reconstruction after distal gastrectomy. We evaluated body weight change, nutritional status, late complications, quality of life (QOL) using the European Organization for Research and Treatment of Cancer Core QOL Questionnaire, and dysfunction using the Dysfunction After Upper Gastrointestinal Surgery for Cancer, 5 years after surgery. Results A total of 228 patients (Billroth I = 105; Roux‐en‐Y = 123) were eligible for efficacy analyses in this study. Body weight loss 5 years after surgery did not differ significantly between the Billroth I and Roux‐en‐Y groups (10.0% ± 7.9% and 9.6% ± 8.4%, respectively; P = .70). There were no significant differences in other aspects of nutritional status between the two groups. Reflux esophagitis occurred in 19.0% of the patients in the Billroth I group vs 4.9% in the Roux‐en‐Y group (P = .002). Regarding QOL, Billroth I was significantly inferior to Roux‐en‐Y on the diarrhea scale (Billroth I: 28.6, Roux‐en‐Y: 16.0; P = .047). Regarding dysfunction, no score differed significantly between the two groups. Conclusions Billroth I and Roux‐en‐Y reconstructions were generally equivalent regarding body weight change, nutritional status, and QOL 5 years after distal gastrectomy, although Roux‐en‐Y more effectively prevented reflux esophagitis and diarrhea.

Abstract Background Pancreaticoduodenectomy after esophageal resection is technically difficult, because blood flow of the gastric conduit should be preserved. Celiac axis stenosis (CAS) is also a problem for pancreaticoduodenectomy, because arterial blood supply for the liver comes mainly through the collateral route from the superior mesenteric artery (SMA) via the gastroduodenal artery (GDA). Herein, we report the case of a patient with pancreatic head cancer who underwent a pancreaticoduodenectomy after esophagectomy with concomitant CAS. Case presentation A 76-year-old man with pancreatic head cancer was referred to our department. He had a history of esophagectomy with retrosternal gastric conduit reconstruction for esophageal cancer. Computed tomography showed severe CAS and a dilated collateral route between the SMA and the splenic artery (SPA). We prepared several surgical options depending on the intraoperative findings, and performed radical pancreaticoduodenectomy with concomitant resection of the distal gastric conduit. The right gastroepiploic artery (RGEA) of the remnant gastric conduit was fed from the left middle colic artery (MCA) with microvascular anastomosis. Despite CAS, when the GDA was dissected and clamped, good blood flow was confirmed, and the proper hepatic artery did not require reconstruction. The patient was discharged on postoperative day 90. Conclusions We successfully performed radical pancreaticoduodenectomy after esophagectomy with concomitant CAS, having prepared multiple surgical options depending upon the intraoperative findings.

Abstract Background Although recently published randomised controlled trials did not confirm significant positive effect of ART-123 or polymyxin B‑immobilised haemoperfusion (PMX-HP) on survival outcome, previous studies using a dataset of 3195 patients with sepsis registered at 42 intensive care units throughout Japan revealed significantly reduced mortality following these treatments. A study has suggested the efficacy of combination therapy with ART-123 and PMX-HP; however, it did not evaluate the effect modification between them. We hypothesised that coadministration of ART-123 and PMX-HP has a significant positive effect modification on survival outcome. The purpose of this study was to evaluate the effect modification between ART-123 and PMX-HP treatment on the survival outcome of sepsis using post hoc analysis of the dataset of the Japan Septic Disseminated Intravascular Coagulation registry. Results Of the 3195 patients recorded in the registry, 2350 were analysed. The product term between ART-123 and PMX-HP was analysed by the Cox regression model to evaluate significance. The primary outcome of this study was hospital mortality. Although the administration of ART-123 was independently positively associated with survival outcome (adjusted hazard ratio [HR]: 0.834, 95% confidence interval [CI] 0.695–0.999; P = 0.049) in the model prior to the introduction of the product term, a significant effect modification on survival outcome was observed between the administration of ART-123 and PMX-HP treatment (adjusted HR: 0.667, 95% CI 0.462–0.961; P = 0.030). Conclusions The main effect of the administration of ART-123 may be beneficial for survival outcome in patients with sepsis. In addition, a significant beneficial effect modification on survival outcome was observed between the administration of ART-123 and PMX-HP treatment.

Background Inferior vena cava filters are widely used to prevent pulmonary embolism, but they can cause serious complications. Case Presentation A 45‐year‐old man with multiple abscesses was transferred to the emergency department from another hospital. Computed tomography revealed bilateral subscapular abscesses, septic pulmonary embolism, and an abdominal aortic pseudoaneurysm with an abscess at the site of the inferior vena cava filter limb inserted 12 years before. After admission to our hospital, surgical drainage of the bilateral subscapular and right wrist joint abscesses was performed; subsequent treatment with ampicillin improved the patient's condition. Inflammation resolved on the 19th hospitalization day, and abdominal aortic replacement surgery was performed. The patient's postoperative course was uneventful. He returned to the previous hospital for rehabilitation after 40 days of hospitalization. Conclusion Inferior vena cava filters could cause serious complications.

BackgroundEarly rehabilitation allows patients to better perform the activities of daily living after hospital discharge. A specialized physical therapist has been assigned as part of the early rehabilitation, but the effectiveness of the program remains unclear. We investigated how early rehabilitation provided by a specialized physical therapist affects ADL in patients with sepsis.MethodsThis was a retrospective cohort study. This study's subjects were sepsis patients who entered the advanced emergency critical care center of Shinshu University Hospital between April 2014 and March 2020. Electronic medical records were reviewed to obtain information on demographic characteristics, severity score, primary source of infection, therapeutic medication, the number of days after hospital admittance until rehabilitation begins, length of hospital stay, discharge to home, and an assessment of daily living activities for each patient. The patients were divided into two groups based on whether they were treated before or after a specialized physical therapist had been hired by the advanced emergency critical care center.ResultsAssigning a physical therapist to a patient significantly shortened the number of days until rehabilitation began. In a multivariable model, the strongest predictors of return to independent living after hospital discharge were (1) assigning a specialized physical therapist (odds ratio = 2.40; 95% confidence interval = 1.09-5.79; P = 0.050) and (2) the number of days until rehabilitation started (odds ratio = 0.24; 95% confidence interval = 0.08-0.76; P = 0.014).ConclusionsAssigning a specialized physical therapist to sepsis patients at an advanced emergency critical care center significantly shortened the number of days until a patient can begin rehabilitation after hospital admittance and improved activities of daily living after hospital discharge.Trial registrationTrial registration [University Hospital Medical Information Network Clinical Trials Registry, number UMIN000040570 (2020/5/28).].

Abstract Aim The present study aimed to evaluate the efficacy of short‐term nutritional intervention with an oral elemental diet (ED; Elental; EA Pharma Co., Ltd, Tokyo, Japan) at 300 kcal/day for 6‐8 weeks in the early post‐gastrectomy period on postoperative long‐term body weight loss (BWL). Methods We analyzed consecutive patients who were randomly divided to receive the regular diet with or without ED. The control group received regular diet alone post‐gastrectomy, whereas the ED group received 300 kcal ED plus regular diet for 6‐8 weeks. Primary endpoint was percentage (%) BWL (body weight loss; body weight before surgery minus that at postoperative 1 year) by surgical type. Secondary endpoints included changes in nutrition‐related blood parameters. Results Of the patients in the original trial, 106 were eligible for efficacy analyses. %BWL at postoperative 1 year was significantly lower in the ED group than in the control group among patients who underwent total gastrectomy (TG) (n = 19 and n = 17, respectively; 9.66 ± 5.98% [95% confidence interval, CI: 6.77‐12.54] vs 15.11 ± 6.78% [95% CI: 11.63‐18.60], P = .015), but not in patients who underwent distal gastrectomy (n = 38 and n = 32, respectively; 5.81 ± 7.91% [95% CI: 3.21‐8.41] vs 5.96 ± 6.20% [95% CI: 3.72‐8.19], P = .933). In multivariate analysis, ED was the only factor affecting %BWL at postoperative 1 year among patients who underwent TG. Conclusions Daily nutritional intervention (300 kcal/day ED) for 6‐8 weeks reduced %BWL not only at postoperative 6‐8 weeks but also at 1 year in patients who underwent TG.

Abstract Background Ventilator weaning protocols have been shown to reduce the duration of mechanical ventilation (MV), intensive care unit length of stay, and resource use. However, weaning protocols have not significantly affected mortality or reintubation rates. The extubation process is a critical component of respiratory care in patients who receive MV. Post-extubation respiratory failure (PERF) is a common event associated with significant morbidity and mortality. We hypothesized that a comprehensive protocol for ventilator weaning and extubation would be effective for preventing PERF and reintubation and reducing mortality in critically ill patients. Methods A ventilator weaning and extubation protocol was developed. The protocol consisted of checklists across four evaluations: spontaneous breathing trial, extubation, prophylactic non-invasive positive pressure ventilation (NPPV), and evaluation after extubation. Observational data were collected after implementing the protocol in patients admitted to the Advanced Emergency and Critical Care Center of Shinshu University Hospital. Not only outcomes of patients but also influences of each component of the protocol on the clinical decision-making process were investigated. Further, a comparison between PERF and non-PERF patients was performed. Results A total of 464 consecutive patients received MV for more than 48 h, and 248 (77 women; mean age, 65 ± 17 years) were deemed eligible. The overall PERF and reintubation rates were 9.7% and 5.2%, respectively. Overall, 54.1% of patients with PERF received reintubation. Hospital stay and mortality were not significantly different between PERF and non-PERF patients (p = 0.16 and 0.057, respectively). As a result, the 28-day and hospital mortality were 1.2% and 6.9%, respectively. Conclusions We found that the rates of PERF, reintubation, and hospital mortality were lower than those in previous reports even with nearly the same degree of severity at extubation. The comprehensive protocol for ventilator weaning and extubation may prevent PERF and reintubation and reduce mortality in critically ill patients.

Background: Spontaneous spinal epidural hematoma (SSEH) is a rare disease. Despite numerous case reports, the clinical characteristics and prognosis of patients with SSEH in the contemporary aging population are unknown. The purpose of this study was to clarify the clinical characteristics, prognostic factors, and optimal management of SSEH. Methods: We retrospectively reviewed and analyzed patients with SSEH who were admitted to Shinshu University Hospital between July 2009 and October 2019. The modified Rankin Scale (mRS) was used to measure the degree of disability in patients with SSEH at discharge as a functional outcome and patients were classified accordingly. Clinical variables of patients with good (mRS 0–2) and poor (mRS > 2) outcomes were compared. Results: We identified 30 patients with SSEH (17 men and 13 women) aged 36–89 years (median age, 67 years). Twelve patients had hypertension. Surgical treatment was performed in 11 patients. The number of patients who had taken anticoagulants was higher in the poor outcome group than in the good outcome group (p = 0.01). The poor outcome group were older (p = 0.048), had a higher operation rate (p = 0.04) and longer lengths of hospitalization (p

Summary: Myoglobin (Mb) is highly concentrated in the myocytes of diving mammals such as whales and seals, in comparison with land animals, and its molecular evolution has played a crucial role in their deep-sea adaptation. We previously resurrected ancestral whale Mbs and demonstrated the evolutional strategies for higher solubility under macromolecular crowding conditions. Pinnipeds, such as seals and sea lions, are also expert diving mammals with Mb-rich muscles. In the present study, we resurrected ancestral pinniped Mbs and investigated their biochemical and structural properties. Comparisons between pinniped and whale Mbs revealed the common and distinctive strategies for the deep-sea adaptation. The overall evolution processes, gaining precipitant tolerance and improving thermodynamic stability, were commonly observed. However, the strategies for improving the folding stability differed, and the pinniped Mbs exploited the shielding of hydrophobic surfaces more effectively than the whale Mbs.

Abstract Malignant lymphoma sometimes manifests with septic‐like shock symptoms. We report a case of peripheral T‐cell lymphoma presenting with unexplained recurrent shock in absence of apparent lymphadenopathy. The patient also experienced varied symptoms, including severe chest and back pain, respiratory distress due to tracheobronchomalacia, skin rash, and fever.

Objective:. We hypothesized that preoperatively planned portal vein resection (PVR), which prevents from approaching tumors, improves survival in patients with resectable pancreatic head cancer adjacent to the portal vein (PhC-PV). Summary:. The decision to perform PVR is difficult in patients with resectable PhC-PV. Methods:. This is a retrospective, bi-institutional study of patients undergoing pancreatoduodenectomy (PD) for resectable PhC-PV from 2009 to 2018. We compared clinical data of patients who underwent PD with preoperatively planned PVR (planned PVR group) and those who underwent conventional PD (cPD) in which decision to perform PVR was made intraoperatively (cPD group). Results:. Among the study population of 176 patients, 53 patients (30.1%) underwent PD with planned PVR. The remaining 123 patients (69.9%) underwent cPD. Tumor characteristics were similar between the 2 groups. Operation time and major complication rates did not differ between the 2 groups. The local recurrence rate of patients in the planned PVR group (28.3%) was lower than that of the cPD group (44.7%; P = 0.041). Median overall survival (OS) was longer in the planned PVR group than in the cPD group (32 vs 27 months; P = 0.011). Multivariate analysis revealed that having undergone planned PVR was an independent factor for favorable OS (hazard ratio = 1.65; 95% confidence interval = 1.08–2.61; P = 0.021). Conclusions:. The preoperative decision to perform PVR improves survival by enhancing local control of resectable PhC-PV.

According to the guidelines for cardiogenic shock, norepinephrine is associated with fewer arrhythmias than dopamine and may be the better first-line vasopressor agent. This study aimed to evaluate the utility of norepinephrine vs. dopamine as first-line vasopressor agent for cardiovascular shock depending on the presence and severity of renal dysfunction at hospitalization. This was a secondary analysis of the prospective, multicenter Japanese Circulation Society Cardiovascular Shock Registry (JCS Shock Registry) conducted between 2012 and 2014, which included patients with shock complicating emergency cardiovascular disease at hospital arrival. The analysis included 240 adult patients treated with norepinephrine alone (n = 98) or dopamine alone (n = 142) as the first-line vasopressor agent. Primary endpoint was mortality at 30 days after hospital arrival. The two groups had similar baseline characteristics, including estimated glomerular filtration rate (eGFR), and similar 30-day mortality rates. The analysis of the relationship between 30-day mortality rate after hospital arrival and vasopressor agent used in patients categorized according to the eGFR-based chronic kidney disease classification revealed that norepinephrine as the first-line vasopressor agent might be associated with better prognosis of cardiovascular shock in patients with mildly compromised renal function at admission (0.0 vs. 22.6%; P = 0.010) and that dopamine as the first-line vasopressor agent might be beneficial for cardiovascular shock in patients with severely compromised renal function [odds ratio; 0.22 (95% confidence interval 0.05–0.88; P = 0.032)]. Choice of first-line vasopressor agent should be based on renal function at hospital arrival for patients in cardiovascular shock.Clinical Trial Registration:http://www.umin.ac.jp/ctr/, Unique identifier: 000008441.

BackgroundTechnical proficiency of the operating surgeons is one of the most important factors in the safe performance of pancreaticoduodenectomy. The objective of the present study was to investigate whether surgical simulation of pancreatico-jejunostomy (PJ) using an inanimate biotissue model could improve the technical proficiency of hepato-biliary pancreatic (HBP) surgical fellows.MethodsThe biotissue drill consisted of sewing biotissues to simulate PJ. The drill was repeated a total of five times by each of the participant surgical fellows. The improvement of the surgical fellows' technical proficiency was evaluated by the supervisor surgeons using the Objective Structured Assessment of Technical Skills (OSATS) scale.ResultsEight HBP surgical fellows completed all the 5 drills. Both the OSATS 25 score and OSATS summary score, assessed by the two supervisor surgeons, improved steadily with repeated execution of the PJ drill. The average OSATS score, as assessed by both the supervisor surgeons, improved significantly from the first to the final drill, with a P value of 0.003 and 0.014 for the assessment by the two surgeons, respectively. On the other hand, no chronological alteration was observed in time of procedure (P = 0.788).ConclusionRepeated execution of a biotissue PJ drill improved the HBP surgical fellows' technical proficiency, as evaluated by OSATS. The present study lends support to the evidence that simulation training can contribute to shortening of the time required to negotiate the learning curve for the technique of PJ in the actual operating room.

Papillary muscle rupture (PMR) is a rare and fatal complication of acute myocardial infarction (AMI). We report a case of acute mitral regurgitation (MR) due to PMR with pulmonary edema and cardiogenic shock following AMI with small myocardial necrosis. An 88-year-old woman was brought to our emergency department in acute respiratory distress, shock, and coma. She had no systolic murmur, and transthoracic echocardiography was inconclusive. Coronary angiography showed obstruction of the posterior descending branch of the right coronary artery. Although the infarction was small, the hemodynamics did not improve. Transesophageal echocardiography established papillary muscle rupture with severe mitral regurgitation 5 days after admission. Thereafter, the patient and her family did not consent to heart surgery, and she eventually died of progressive heart failure. Physicians should be aware of papillary muscle rupture with acute mitral regurgitation following AMI in patients with unstable hemodynamics, no systolic murmur, and no abnormalities revealed on transthoracic echocardiography.

A public health emergency of current international concern is the outbreak of a severe respiratory illness, that is, coronavirus disease (COVID-19). The disease initially started in Wuhan, China, and it rapidly spread to most regions of the world. Herein, we report a case of critical COVID-19 pneumonia treated with extracorporeal membrane oxygenation from symptom onset day 19 (SOD#19) to SOD#30. We describe the patient's clinical course, from mild symptoms at the time of illness onset to symptoms of severe pneumonia as the illness progressed. We provide important information regarding our clinical experience for further understanding of management discrepancies, as treatment with extracorporeal membrane oxygenation or pharmacotherapy (e.g., antivirals, immunomodulators, and glucocorticoids) is often dependent on the severity of symptoms.

Abstract Background Intraductal papillary-mucinous neoplasms (IPMNs) are potentially malignant intraductal epithelial neoplasms that sometimes penetrate into other organs. To the best of our knowledge, no report has yet described a case with penetration into the spleen. We recently encountered a case of IPMN with penetration of the stomach and spleen that was successfully treated by total pancreatectomy. Case presentation A 70-year-old female visited our hospital with a complaint of fever and abdominal pain. Contrast-enhanced computed tomography (CT) revealed dilatation of the main pancreatic duct in the entire pancreas and penetration into the stomach and spleen. Upper gastrointestinal endoscopy revealed mucin extruding from four openings of the fistula in the stomach. No malignancy was detected based on cytology of the mucin. Inflammation markers and tumor markers (CEA, CA19–9) were elevated in the blood. The pre-operative diagnosis was IPMN of main pancreatic duct type penetrating into the stomach and spleen. A total pancreatectomy and splenectomy were performed, combined with distal gastrectomy including resection of the fistulas between the pancreas and stomach. No postoperative complications were noted. Histopathological examination of the resected specimen revealed atrophy of the pancreatic parenchyma, and the main duct of the pancreas was filled with mucin. Mucin-producing malignant tumor cells were detected in the epithelium of the main pancreatic duct with no signs of invasion. No malignancy was found at the fistulas between the pancreas and stomach or spleen. The patient was finally diagnosed with non-invasive intraductal papillary-mucinous carcinoma (IPMC) of main pancreatic duct type. Mechanical penetration was suspected as a mechanism of the penetration. The patient remained disease-free without evidence of recurrence more than 15 months after the operation. Conclusion Though IPMNs sometimes penetrate into other adjacent organs, penetration into two organs, including the spleen, is rare. The rare case of IPMC penetrating into the stomach and spleen presented here was treated successfully by total pancreatectomy.

This article presented the data related to the research article entitled “Calibration-free concentration analysis for an analyte prone to self-association” (H. Imamura, S. Honda, 2017) [1]. The data included surface plasmon resonance (SPR) responses of the variants of protein G with different masses under mass transport limitation. The friction factors of the proteins analyzed by an ultracentrifugation were recorded. Calculation of the SPR response of the proteins was also described.