Surgical treatment of appendiceal mucormycosis in an immunocompromised patient: a case report.

BACKGROUND: Gastrointestinal mucormycosis is a rapidly progressing and often fatal disease, predominantly affecting immunocompromised patients. Surgical intervention, in addition to antifungal therapy, is essential. Herein, we describe the successful management of appendiceal mucormycosis in a patient with acute promyelocytic leukemia through rapid surgical intervention and antifungal therapy. CASE PRESENTATION: A 29-year-old woman underwent autologous peripheral blood stem cell transplantation for acute promyelocytic leukemia (APL). Subsequently, her condition relapsed, and remission induction therapy was initiated. During the immunosuppressive period, she developed a fever and severe abdominal pain. Computed tomography revealed severe edema of the ileum, cecum, and ascending colon. Despite receiving multiple antibiotics, antivirals, and antifungals, her condition showed no improvement. Consequently, she underwent exploratory laparotomy, with no bowel perforation noted, revealing severe inflammation in the ileum, cecum, and ascending colon, as well as appendiceal necrosis. Appendectomy was performed, and histopathological analysis revealed hyphae in the vessels and layers of the appendiceal wall, suggestive of mucormycosis. The patient was diagnosed with appendiceal mucormycosis, and liposomal amphotericin B was administered. Subsequent monitoring showed no recurrence of mucormycosis. Genetic analysis of the resected tissue revealed Rhizopus microspores as the causative agent. CONCLUSIONS: Rapid surgical intervention and antifungal drug administration proved successful in managing appendiceal mucormycosis in a patient with APL. Early recognition and aggressive surgical intervention are imperative to improve outcomes in such patients.

Increased ACE2 and TMPRSS2 expression in ulcerative colitis.

Ulcerative colitis (UC) is a cryptogenic inflammatory bowel disease, and there is an urgent need to elucidate its pathogenesis. ACE2 and TMPRSS2, the entry molecules of SARS-CoV-2, are reportedly associated with the disease; however, no consensus has been reached yet. In this study, we examined the expression of ACE2 and TMPRSS2 in colon and rectal specimens of UC. We collected colorectal specimens from 60 patients (30 patients with UC and 30 controls from 2018 to 2021) and analyzed the proportion and intensity of ACE2 and TMPRSS2 using immunohistochemistry. The results revealed a significant increase in the proportion of ACE2 expression and the intensity of TMPRSS2 expression in patients with UC. ACE2 and TMPRSS2 expression in UC remained unaffected by the COVID-19 pandemic. We demonstrated that ACE2 and TMPRSS2 are likely involved in the pathogenesis of UC.

Kikuchi Disease After SARS-CoV-2 Vaccination: A Case Report With Immunohistochemical Analyses.

SARS-CoV-2 vaccines have been administered in many countries after the COVID-19 pandemic. Lymphadenopathy is a side effect of SARS-CoV-2 vaccine. We report a rare example of Kikuchi disease in the cervical lymph nodes after SARS-CoV-2 vaccination. A 41-year-old man complained of a swollen neck and fever 9 days after the first dose of SARS-CoV-2 mRNA-1273 vaccine. Computed tomography revealed enlarged cervical lymph nodes. Fine needle aspiration and resection were performed, and the clinicopathological diagnosis was consistent with Kikuchi disease. Histologically, the resected lymph nodes lost their polarity, and many histiocytes were aggregated with karyorrhectic nuclear debris and apoptosis. SARS-CoV-2 positive cells were small lymphocytes detected by immunohistochemistry. This is the first report that demonstrated SARS-CoV-2 expression in Kikuchi disease post-SARS-CoV-2 vaccination.

The Histological Detection of Ulcerative Colitis Using a No-Code Artificial Intelligence Model.

Ulcerative colitis (UC) is an intractable disease that affects young adults. Histological findings are essential for its diagnosis; however, the number of diagnostic pathologists is limited. Herein, we used a no-code artificial intelligence (AI) platform "Teachable Machine" to train a model that could distinguish between histological images of UC, non-UC coloproctitis, adenocarcinoma, and control. A total of 5100 histological images for training and 900 histological images for testing were prepared by pathologists. Our model showed accuracies of 0.99, 1.00, 0.99, and 0.99, for UC, non-UC coloproctitis, adenocarcinoma, and control, respectively. This is the first report in which a no-code easy AI platform has been able to comprehensively recognize the distinctive histologic patterns of UC.

Tranexamic acid and blood loss in pancreaticoduodenectomy: TAC-PD randomized clinical trial.

BACKGROUND: Tranexamic acid (TXA) may reduce intraoperative blood loss, but it has not been investigated in pancreaticoduodenectomy (PD). METHODS: A pragmatic, multicentre, randomized, blinded, placebo-controlled trial was conducted. Adult patients undergoing planned PD for biliary, duodenal, or pancreatic diseases were randomly assigned to TXA or placebo groups. Patients in the TXA group were administered 1 g TXA before incision, followed by a maintenance infusion of 125 mg/h TXA. Patients in the placebo group were administered the same volume of saline as those in the placebo group. The primary outcome was blood loss during PD. The secondary outcomes included perioperative blood transfusions, operating time, morbidity, and mortality. RESULTS: Between September 2019 and May 2021, 218 patients were randomly assigned and underwent surgery (108 in the TXA group and 110 in the placebo group). Mean intraoperative blood loss was 659 ml in the TXA group and 701 ml in the placebo group (mean difference -42 ml, 95 per cent c.i. -191 to 106). Of the 218 patients, 202 received the intervention and underwent PD, and the mean blood loss during PD was 667 ml in the TXA group and 744 ml in the placebo group (mean difference -77 ml, 95 per cent c.i. -226 to 72). The secondary outcomes were comparable between the two groups. CONCLUSION: Perioperative TXA use did not reduce blood loss during PD. REGISTRATION NUMBER: jRCTs041190062 (https://jrct.niph.go.jp).

Removing part of the pancreas is an operation with a risk of major blood loss. Tranexamic acid is a drug thought to reduce blood loss. This study asked the question, 'Does tranexamic acid reduce blood loss during surgery on the pancreas?' Half of patients received tranexamic acid during surgery. The other half received only standard care. This study showed that tranexamic acid did not decrease the blood loss during the surgery and may have little effect in patients having a pancreaticoduodenectomy.

A desmoid tumor with fluorodeoxyglucose accumulation arising from the anastomotic site of postoperative gastric cancer: a case report.

BACKGROUND: Desmoid tumors are extremely rare borderline benign and malignant tumors that do not exhibit accumulation on fluorodeoxyglucose positron emission tomography-computed tomography. In the present study, we report a rare case of a desmoid tumor with fluorodeoxyglucose accumulation at the anastomotic postoperative gastric cancer site. CASE PRESENTATION: A 68-year-old Japanese man underwent robot-assisted laparoscopic distal gastrectomy for early-stage gastric cancer in 2019. The pathological diagnosis was stage IA cancer, and no adjuvant chemotherapy was administered. Two years after surgery, a soft mass appeared on the greater curvature side of the anastomosis on computed tomography. Fluorodeoxyglucose positron emission tomography-computed tomography revealed fluorodeoxyglucose accumulation, which suggested a malignancy; therefore, surgery was performed for diagnostic treatment. The histopathological findings led to the diagnosis of a desmoid tumor. The patient has not experienced recurrence to date. CONCLUSIONS: In the present study, we encountered a desmoid tumor arising from the anastomotic site of a postoperative gastric cancer. This case is rare as fluorodeoxyglucose positron emission tomography-computed tomography showed fluorodeoxyglucose accumulation in the desmoid tumor, and a preoperative diagnosis could not be reached. We hope that further studies will improve the accuracy of preoperative diagnosis.

Impact of chest subcutaneous fat on the occurrence of central venous port-related infectious complications in cancer patients.

PURPOSE: There is no concrete evidence to support the association between the amount of subcutaneous fat area (SFA) in the central venous port-insertion site (precordium) and port-related complications. We aimed to investigate the relationship between SFA in the midclavicular line and postoperative infectious complications in patients undergoing port-insertion surgery. METHODS: This was a single-institute and historical cohort study of 174 patients who underwent first central venous port implantation surgery for chemotherapy between January 2014 and December 2018. SFA in the midclavicular line was measured using preoperative computed tomography scans. The patients were divided into three groups according to SFA amount tertiles, and we investigated the association of SFA with infectious and all-cause complication events within 1 year. RESULTS: Within a median follow-up of 306 days, the patients with intermediate SFA had significantly higher infection-free survival than those with low and high SFA (low vs. intermediate vs. high: 80.4% vs. 97.7% vs. 83.4%, respectively, p=0.034). In contrast, there was no significant difference in the overall complication-free survival among the groups (low vs. intermediate vs. high: 80.4% vs. 88.9% vs. 81.8%, respectively, p=0.29). Low SFA was independently associated with high risk of infectious complications (hazard ratio, 9.45; 95% confidence interval, 1.07-83.22, p=0.043). CONCLUSION: Low SFA in the midclavicular line was an independent risk factor for infectious complications in the chemotherapy setting. This practical indicator can be useful for optimizing patients' nutritional status and when considering other types of vascular access to support administration of intravenous chemotherapy.

Ruptured intra-abdominal testicular seminoma with hemorrhage shock, after inadequate surgical exploration for undescended testis: a case report.

BACKGROUND: Undescended testes are associated with an increased risk of malignancy and infertility, and surgical treatment in childhood is recommended. CASE PRESENTATION: A 35-year-old man presented to the emergency department with abdominal pain and vomiting. Despite a history of surgery for a left undescended testis in infancy, his left-sided scrotum appeared underdeveloped. Contrast-enhanced computed tomography showed a pelvic mass, involving a major axis of approximately 15 cm, with high-density ascites suggestive of hemorrhage. A ruptured gastrointestinal stromal tumor was suspected. As he was in hemorrhagic shock, an emergency laparotomy was indicated. The active bleeding mass was controlled through complete resection. A pathological evaluation of the mass revealed a seminoma arising from an undescended testis. His post-operative course was uneventful, and he was discharged on post-operative day 6. Recurrence on the retroperitoneal lymph nodes was detected 1 year postoperatively, and a retroperitoneal lymph node dissection was performed after chemotherapy. He remains well without any apparent signs of recurrence. CONCLUSIONS: Paying close attention to an empty scrotum is advisable, even postoperatively, for undescended testis because of possible subsequent potential malignancy presenting with hemorrhage, as our patient demonstrated.

Preoperative Magnetic Resonance Cholangiopancreatography for Detecting Difficult Laparoscopic Cholecystectomy in Acute Cholecystitis.

Previous studies have shown that signal intensity variations in the gallbladder wall on magnetic resonance imaging (MRI) are associated with necrosis and fibrosis in the gallbladder of acute cholecystitis (AC). However, the association between MRI findings and operative outcomes remains unclear. We retrospectively identified 321 patients who underwent preoperative magnetic resonance cholangiopancreatography (MRCP) and early laparoscopic cholecystectomy (LC) for AC. Based on the gallbladder wall signal intensity on MRI, these patients were divided into high signal intensity (HSI), intermediate signal intensity (ISI), and low signal intensity (LSI) groups. Comparisons of bailout procedure rates (open conversion and laparoscopic subtotal cholecystectomy) and operating times were performed. The recorded bailout procedure rates were 6.8% (7/103 cases), 26.7% (31/116 cases), and 40.2% (41/102 cases), and the median operating times were 95, 110, and 138 minutes in the HSI, ISI, and LSI groups, respectively (both p < 0.001). During the multivariate analysis, the LSI of the gallbladder wall was an independent predictor of both the bailout procedure (odds ratio [OR] 5.30; 95% CI 2.11-13.30; p < 0.001) and prolonged surgery (≥144 min) (OR 6.10, 95% CI 2.74-13.60, p < 0.001). Preoperative MRCP/MRI assessment could be a novel method for predicting surgical difficulty during LC for AC.

A case of a jejunal gastrointestinal stromal tumor with significantly elevated CA19-9 levels.

INTRODUCTION: A gastrointestinal stromal tumor (GIST) with an elevated serum tumor marker level is very rare. We report a case of jejunal GIST associated with extremely elevated levels of serum carbohydrate antigen 19-9 (CA19-9). PRESENTATION OF CASE: A 61-year-old woman was referred to our hospital for examination of an abdominal tumor. Laboratory tests revealed extremely elevated CA19-9 levels (13,498 U/mL). Enhanced abdominal computed tomography demonstrated a well-enhanced, round 40 mm tumor. The patient underwent a jejunectomy and lymph node dissection. Based on the postoperative pathological findings, the tumor was diagnosed as a GIST. Microscopically, a solid region of the resected tumor showed negative staining for CA19-9. The serum CA19-9 level drastically decreased postoperatively. DISCUSSION: Increased proliferation of epithelial cells secondary to inflammation and ulceration of epithelia may lead to increased secretion and accumulation of CA19-9, which is consequently released into the blood circulation. CONCLUSION: In cases of GIST, an isolated increase of serum CA19-9 is extremely rare; but they are not necessarily associated with malignant transformation.

Total proctocolectomy with end ileostomy for acute onset of ulcerative colitis during chemoradiotherapy for lung adenocarcinoma (successfully treated by surgery): a case report.

BACKGROUND: Ulcerative colitis (UC) developing during chemotherapy is very rare. Here, we describe a case of acute onset during chemoradiotherapy for lung adenocarcinoma, requiring a total proctocolectomy. CASE PRESENTATION: A 52-year-old man was admitted to the hospital for chemoradiotherapy of lung cancer. He had no obvious history of gastrointestinal diseases, and concurrent chemoradiotherapy was initiated. Thirteen days after 2 cycles of cisplatin and vinorelbine, he experienced persistent hematochezia. Findings of the colonoscopy revealed edematous thickening from the rectum to the transverse colon, suggesting UC, drug-induced colitis, or infectious colitis. Results from bacterial culture were negative for Clostridium difficile and methicillin-resistant Staphylococcus aureus (MRSA). Immunohistological staining for cytomegalovirus was also negative. Although he was clinically diagnosed with UC and treated with intravenous glucocorticoid, his symptoms gradually worsened and an abdominal X-ray revealed megacolon. Thirty-five days after conservative therapy, a total proctocolectomy with end permanent ileostomy was performed. Based on pathological findings and clinical course, he was diagnosed with UC. CONCLUSION: Although the pathogenesis of UC during chemotherapy has been unknown, chemotherapy could be one of the causes of UC in this case. UC should be included in the differential diagnosis in patients with progressive colitis during chemotherapy.

Phase 2 Trial of Adjuvant Chemotherapy With S - 1 for Node-Positive Biliary Tract Cancer (N-SOG 09).

BACKGROUND: Nodal metastasis is a leading attributable factor of poor survival in biliary tract cancer (BTC), and adjuvant chemotherapy targeting this high-risk feature has not been attempted to date. This study aimed to test the efficacy of adjuvant S - 1 for patients with node-positive BTC. METHODS: This single-arm multicenter phase 2 trial enrolled patients who underwent resection for histologically proven node-positive BTC. In this trial, S - 1 was administered at a dose of 80-120 mg/day on 14 days of a tri-weekly cycle for 6 months. The primary end point of the trial was 3-year overall survival (OS), in which the result would be promising if the 90% confidence interval (CI) surpassed a threshold of 30% (alpha error, 0.1; beta error, 0.2). The secondary end points were relapse-free survival (RFS), feasibility, and toxicity. RESULTS: The trial included 50 patients with perihilar (n = 23) or distal (n = 20) cholangiocarcinoma, or gallbladder cancer (n = 7). The median numbers of positive lymph nodes and examined lymph nodes were respectively 2 and 15. The 3-year OS and RFS were respectively 50% (90% CI, 40.9-59.1%) and 32.0% (95% CI, 19.1-44.9%), with median survival times of 34.6 months (95% CI, 19.3-49.8 months) and 18.4 months (95% CI, 11.9-24.9 months). Although hematologic toxicity often occurred, grades 3 and 4 toxicity were rare. The completion rate of the test therapy was 64%, and the median relative dose intensity was 87.5% (interquartile range, 50-100%). CONCLUSION: Adjuvant chemotherapy with S - 1 may be promising for patients with node-positive BTC.

Novel use of the Nathanson liver retractor to prevent postoperative transient liver dysfunction during laparoscopic gastrectomy.

INTRODUCTION: The Nathanson liver retractor (N) has been known to cause postoperative transient liver dysfunction (POTLD) in laparoscopic gastrectomy (LG). To reduce the incidence of POTLD, specifically we added to the retractor the use of a disk (N + D) to reduce the localized pressure, and furthermore repositioned the retractor every 30 minutes (N + D TM) to reduce the liver retraction time. Before and after introducing this retractor, we assessed four consecutive retraction procedures. These included the following disk suspension methods (D), N, N + D, and N + D TM. METHODS: We retrospectively enrolled 85 patients who underwent an LG. In the D, N, N + D, and N + D TM groups, we evaluated the postoperative serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) values. RESULTS: For the D and N groups, the AST value significantly increased from the immediate post-operation time point (IPOT) to the third postoperative day (POD3). Additionally, the ALT value increased from IPOT to POD7. In the N + D group, the only decrease was in the ALT value at IPOT compared to the N group. The N + D TM group decreased in both the AST value from IPOT to POD3 and in the ALT value from IPOT to POD7, compared to the N group. CONCLUSIONS: Our findings demonstrate the importance of reducing both the localized pressure and liver retraction time when using the Nathanson retractor to prevent POTLD during an LG. To make this possible, we successfully introduced the use of both a disk and the repositioning of the retractor at 30 minute intervals.

Intraductal dissemination of ampullary carcinoma after pancreatoduodenectomy.

BACKGROUND: Clinical evidence of intraductal dissemination through the pancreatic duct has been rare. We herein describe a case of ampullary carcinoma that disseminated in the remnant pancreas through the pancreatic duct. CASE PRESENTATION: A 68-year-old woman underwent SSPPD for ampullary carcinoma. The tumor was diagnosed as adenocarcinoma without lymph node metastasis (T2N0M0, stage IB). Computed tomography (CT) performed 3 years later revealed a 14-mm tumor near the site of the pancreaticojejunal anastomosis. Endoscopic ultrasound-guided fine needle aspiration showed adenocarcinoma that was morphologically similar to the specimen from the first surgery. We diagnosed recurrence of ampullary carcinoma in the remnant pancreas. A total remnant pancreatectomy was performed. We found a white solid tumor at the 20-mm distal side of pancreaticojejunal anastomosis. The tumor was morphologically similar and immunostaining showed a pattern identical to that of the original tumor, suggesting that the two tumors were of the same origin. CONCLUSION: The recurrent lesion was most likely the result of tumor cells leaving the tumor and implanting in the remnant pancreatic duct epithelium. Intraductal dissemination of adenocarcinoma is thought to be a cause of remnant recurrence after SSPPD in cases of obstruction of the pancreatic duct or an iatrogenic procedure.

Short-term outcomes of robotic-assisted laparoscopic rectal surgery: A pilot study during the introductory period at a local municipal hospital.

OBJECTIVES: The aim of this pilot study was to confirm the safety and feasibility of the induction of robotic-assisted laparoscopic rectal surgery (RRS) at a local municipal hospital. A municipal hospital does not indicate a small hospital. The most significant difference between a municipal hospital and a center or university hospital is that most surgeons in a municipal hospital are general surgeons. METHODS: The first 30 patients who underwent RRS at the municipal hospital were enrolled between April 2015 and June 2016. All surgeries were performed by a single trained surgeon using the da VinciⓇ Si surgical system. The primary endpoint was the incidence of postoperative major complications. RESULTS: Of the study patients, 29 had adenocarcinoma and 1 had ulcerative colitis. The surgical procedures included anterior resection (n = 22), intersphincteric resection (n = 2), abdominoperineal resection (n = 4), Hartmann's procedure (n = 1), and total coloproctectomy (n = 1). There were no intraoperative complications and conversion cases. The median operative time and blood loss were 283.5 min and 9 ml, respectively. The incidence rate of postoperative major complications was 10%, which included anastomotic leakage in 2 patients and ileus in 1 patient. Postoperative urinary dysfunction did not occur in any patient. Complete resection was achieved for all patients. CONCLUSIONS: We demonstrated that the induction of RRS was safe and feasible, even at a local municipal hospital, given that the surgeons had the sufficient skills and experience in both laparoscopic and colorectal surgery. *The study protocol was registered at the University Hospital Medical Information Network (UMIN000017022).

Laparoscopic surgery of a presacral epidermoid cyst: A case report.

INTRODUCTION: The best approach for resecting epidermoid cysts is still controversial. We describe a case of an epidermoid cyst in which laparoscopic resection was performed successfully. PRESENTATION OF CASE: 63 × 55-mm well-defined cystic mass was incidentally detected by computed tomography in the presacral cavity of a 50-year-old woman during evaluation for upper abdominal pain. Magnetic resonance imaging showed a cystic tumor with a low signal intensity on T1-weighted images and, high signal on T2-weighted images in the left dorsal side of the rectum. This tumor was diagnosed as a developmental cyst, and laparoscopic resection was performed. Resection of the tumor was performed with negative margins. This tumor was histopathologically diagnosed as an epidermoid cyst. There was no evidence of malignancy, and no postoperative event or signs of recurrence occurred 6 months postoperatively. DISCUSSION: In our patient, there was no difficulty in the field of view and forceps operability during laparoscopic surgery. Furthermore, it is possible to perform laparoscopic surgery with minimal damage to the muscles, nerves, and rectum, leading to the preservation of anal function. CONCLUSION: Laparoscopic resection of an epidermoid cyst may be a better option in carefully selected cases with consideration of the tumor size and location.

Evaluation of Hepatic Resection in Liver Metastasis of Gastric Cancer.

Gastric cancer is the second most common malignancy globally and the third most common cause of cancer-related deaths in Japan. In gastric cancer, benefit of surgical resection of liver metastasis, which was shown in colorectal cancer, is not well established. The present study aimed to examine the feasibility of hepatic resection for liver metastasis of gastric cancer. In this retrospective study, we reviewed the medical records of 10 patients with liver-only metastases of gastric cancer who underwent hepatectomy among 2043 patients with gastric cancer who underwent gastric resection between January and December 2016 at a single institution in Japan. Median 1-, 3-, and 5-year overall survival (OS) rates were 78.0%, 33.3%, and 22.2%, respectively, among 10 patients who underwent hepatic resection. There was a significant difference in OS rates between tumors measuring ≥ 5 cm and < 5 cm (hazard ratio [HR] 6.524, 95% confidence interval [CI] 1.145-37.171, p = 0.035). The longest survival was 205 months for one patient who was alive at the time of the analysis. Hepatic resection of liver metastasis in gastric cancer was associated with long-term survival in some patients. Additionally, primary tumor size was associated with long-term survival.

Pneumococcal infection transmission between family members with congenital asplenia: A case report.

BACKGROUND: Asplenia, the lack of a spleen, can be congenital and increases susceptibility to severe infections caused by encapsulated bacteria, such as Streptococcus pneumoniae (S. pneumoniae). We report two cases of severe pneumococcal infection in two asplenic family members living in the same household. CASE SUMMARY: Patient 1, a 38-year-old man with a history of congenital hepatitis B infection and hypospadias, was brought to our emergency department with complaints of cyanosis, cough, and edema of his limbs. He was clinically diagnosed as hyposplenic with overwhelming pneumococcal sepsis. He was admitted to the intensive care unit and was administered antibiotics and catecholaminergic therapy but died 2 h after admission. Patient 2, a 63-year-old woman with a history of type 2 diabetes, was brought to our emergency department one month after admission of Patient 1. She was diagnosed as asplenic with overwhelming pneumococcal sepsis. History-taking revealed that she was the mother of Patient 1 and the two had lived in the same household. She was admitted to the intensive care unit and was rapidly provided antibiotics and catecholaminergic intervention but died one day after admission. CONCLUSION: Pneumococcal bacteremia caused by virulent S. pneumoniae may be transmitted within households. All residents of households where individuals with pneumococcal bacteremia are living should be educated about the risk of transmissibility. Family members of patients with congenital asplenia/hyposplenia, all family members should be examined to assess their splenic function.

Neoadjuvant CAPOX and bevacizumab alone for locally advanced rectal cancer: long-term results from the N-SOG 03 trial.

BACKGROUND: Neoadjuvant chemotherapy (NAC) alone for locally advanced rectal cancer (LARC) remains an experimental treatment, and the efficacy in terms of long-term outcome has not been fully elucidated. The N-SOG 03 trial examined the safety and efficacy of neoadjuvant CAPOX and bevacizumab (Bev) without radiotherapy in patients with poor-risk LARC. METHODS: Thirty-two patients with MRI-defined LARC received neoadjuvant CAPOX and Bev followed by curative resection between 2010 and 2011. The overall survival (OS), progression-free survival (PFS), and local-relapse rate (LRR) were calculated using the Kaplan-Meier method, and the risk factors were evaluated by multivariate analysis using the Cox proportional hazard models. This trial is registered with UMIN, number 000003507. RESULTS: In the entire cohort, the 5-year OS was 81.3%. Because of disease progression during chemotherapy, 3 patients ultimately did not undergo curative surgery. As a result, 29 patients underwent R0/1 resection. Among these 29 patients, the 5-year OS, PFS, and LRR were 89.7%, 72.4% and 13.9%, respectively. In multivariate analysis, cT4b tumor was an independent poor prognostic factor for OS and LRR, and ypT4b tumor and absence of N down-staging were independent poor prognostic factors for PFS. CONCLUSIONS: Patients with cT4b tumor were not suitable for NAC alone. However, the long-term outcomes of the other patients were satisfactory, and NAC alone might be an option for treatment of LARC. N down-staging was likely to bring favorable PFS, even in patients with cStage III.

A case of gastric glomus tumor resection using laparoscopy endoscopy cooperative surgery (LECS).

INTRODUCTION: Gastric glomus tumors are rare submucosal mesenchymal tumors. Because gastric glomus tumors are submucosal tumors and resemble gastrointestinal stromal tumors (GISTs), preoperative diagnosis is difficult. We present a case of gastric glomus tumor that was removed by laparoscopy endoscopy cooperative surgery (LECS). CASE PRESENTATION: A 67-year-old female was taken to the emergency room at our hospital due to epigastric pain. An upper gastrointestinal endoscopy revealed a submucosal tumor (SMT) located in the lesser curvature of the upper body of the stomach. Endoscopic ultrasonography revealed an intraluminal hypoechoic tumor located in the third or fourth layer of the stomach wall. Contrast-enhanced computed tomography (CECT) of the abdomen showed a 20-mm, well-enhanced, intraluminal-type tumor located in the lesser curvature of the upper body of the stomach. Laparoscopy endoscopy cooperative surgery (LECS) was performed. Immunohistochemistry revealed the expression of smooth muscle actin and vimentin, but not of keratin, S-100 protein, C-kit, or CD34. The tumor was finally diagnosed as a gastric glomus tumor. CONCLUSION: Glomus tumors are rare submucosal tumors of the stomach, and they should be considered in the differential diagnosis of gastric submucosal tumors. LECS could be a less invasive and effective method for treatment of gastric glomus tumor.