A Case of Low-Grade Appendiceal Mucinous Neoplasm That Led to Surgery After 12 Years of No Treatment.

Low-grade appendiceal mucinous neoplasm (LAMN) is a relatively rare, non-invasive appendiceal tumor. We experienced a case of LAMN that led to surgery after 12 years of no treatment. Until now, LAMN has been reported to progress more slowly than other tumors, but there have been no reports of long-term follow-up of appendiceal tumors without treatment.

Presence of cystic duct stone is a risk for postoperative retained stones in patients with acute cholecystitis.

Purpose: Retained stones (RS) in the common bile duct (CBD) are one of the major problems after laparoscopic cholecystectomy and usually require endoscopic treatment. However, few reports have investigated risk factors for the development of RS in the CBD.

Methods: A total of 325 patients with acute cholecystitis underwent laparoscopic cholecystectomy at our hospital between January 2013 and Jury 2021.

Prediction of extensive necrotic change in acute gangrenous cholecystitis.

Purpose: Gangrenous cholecystitis (GC) is a severe type of acute cholecystitis that implies higher mortality and morbidity rates than uncomplicated cholecystitis. The characteristics of GC are various for each case. However, preoperative predictors of GC with extensive necrotic change have not been investigated well.

Does the presence of an appendicolith or abscess predict failure of nonoperative management of patients with acute appendicitis?

Purpose: Nonoperative management (NOM) has been widely accepted as one of the standard treatments for patients with acute appendicitis. However, predictive factors for the failure of NOM have not been thoroughly investigated.

Methods: A total of 196 patients with acute appendicitis underwent NOM between April 2014 and December 2020.

Treatment of 1,4-dioxane-containing water using carriers immobilized with indigenous microorganisms in landfill leachate treatment sludge: A laboratory-scale reactor study.

1,4-Dioxane (DX) is a contaminant of emerging concern in aquatic environments, and is frequently found in landfill leachate. As a biological method applicable to landfill leachate treatment facilities, the feasibility of DX treatment using carriers immobilized with microorganisms indigenous to landfill leachate treatment sludge was explored through laboratory-scale reactor experiments by introducing carriers prepared via microorganism immobilization in the aeration tank of a leachate treatment facility. Three different carrier materials were used to immobilize microorganisms, and a model DX-containing water (10 mg/L) was treated under continuous feeding.

Does preoperative MRCP imaging predict risk for conversion to subtotal cholecystectomy in patients with acute cholecystitis?

Background: Subtotal cholecystectomy (SC) is a useful procedure for avoiding bile duct injury in patients with difficult gallbladder. However, risk factors for conversion to SC, especially preoperative magnetic resonance cholangiopancreatography (MRCP) findings that predict conversion to SC, have not been investigated in detail.

Methods: A total of 290 patients with acute cholecystitis who underwent laparoscopic cholecystectomy at our hospital between November 2011 and March 2020 were included.

A case of indirect inguinal bladder hernia treated by laparoscopic hernia repair.

Inguinal bladder hernia is a rare clinical condition, and only a small number of reported cases have been treated by laparoscopic surgery. In the present case, the patient was a 78-year-old man who presented to our emergency department with a chief complaint of right inguinal bulge and pain. CT imaging revealed an incarcerated right inguinal hernia containing the small intestine and a portion of the urinary bladder.

Emergency surgery versus elective surgery after reduction for patients with incarcerated groin hernias.

Background: The feasibility and potential advantages of elective surgery after manual reduction of incarcerated hernia (IH) have not been investigated in detail. Therefore, the aim of this retrospective study was to compare perioperative outcomes of emergency surgery to those of elective surgery after reduction of IH.

Methods: A total of 112 patients were preoperatively diagnosed with IH between January 2010 and April 2019.

Does early surgery imply a critical risk for patients with Grade III acute cholecystitis?

Background: For patients with Grade III acute cholecystitis (AC), several factors have been proposed in the 2018 Tokyo guidelines as caution signs in performing early surgery. However, these factors have not been externally validated in detail.

Methods: This retrospective study examined 35 patients who had been diagnosed with Grade III AC and treated with laparoscopic cholecystectomy between January 2008 and July 2019.

Risk factors for postoperative bile leak in patients who underwent subtotal cholecystectomy.

Background: Subtotal cholecystectomy (SC) is a procedure for avoiding the risk of bile duct injury, especially in patients with difficult gallbladders. However, recent meta-analyses have demonstrated that SC is associated with a relatively high incidence of postoperative bile leak. To our knowledge, there have been no reports that have investigated risk factors for postoperative bile leak.

Laparoscopic vs open surgery for patients with strangulated small bowel obstruction.

Background: Recent reports revealed that laparoscopic adhesiolysis is a feasible procedure for patients with adhesive small bowel obstruction (SBO). However, the feasibility of laparoscopic surgery for strangulated SBO has not been investigated in detail.

Methods: Ninety-six patients who underwent surgery for strangulated SBO between April 2008 and September 2019 were included.

[A Patient with Lung Cancer Experiencing Abdominal Aortic Aneurysm Rupture during Bevacizumab Treatment-Case Report].

Case: Right pleural effusion was detected on chest X-ray performed prior to surgery for a right inguinal hernia in a 63-yearold man. Adenocarcinoma was diagnosed based on pleural effusion cytology results. A CT scan revealed mediastinal lymphadenopathy and pleural dissemination, but no obvious lung tumor; other examinations also did not reveal a primary tumor.

Carbon sources that enable enrichment of 1,4-dioxane-degrading bacteria in landfill leachate.

1,4-Dioxane (DX) is a recalcitrant cyclic ether that has gained attention as an emerging pollutant in the aquatic environment. Enrichment of indigenous DX-degrading bacteria, which are considered to be minor populations even in DX-impacted environments, is the key for efficient biological DX removal. Therefore, this study aimed to explore carbon sources applicable for the enrichment of DX-degrading bacteria present in landfill leachate, which is a potential source of DX pollution.

Two Cases of Subvesical Bile Duct Injury Detected and Repaired Simultaneously during Laparoscopic Cholecystectomy.

Introduction: Subvesical bile duct (SVBD) injury is a secondary major cause of minor bile duct injury after laparoscopic cholecystectomy (LC). However, this injury is usually not recognized intraoperatively, but postoperatively.

Case Report: Case 1: the patient was an 84-year-old female, preoperatively diagnosed with acute cholecystitis.

A Case of Isolated Cecal Necrosis Preoperatively Diagnosed with Perforation of Cecum.

Isolated cecal necrosis (ICN) is a rare condition which is developed under decreased mesenteric perfusion. Only a few dozen cases of ICN have been reported previously. The patient was a 59-year-old male with a previous history of atrial fibrillation.

Are Preoperative CT Findings Useful for Predicting Postoperative Intraabdominal Abscess in the Patients with Acute Appendicitis?

: In patients with acute appendicitis (AA), preoperative computed tomography (CT) findings suggesting development of intraabdominal abscess (IAA) had not been widely used. The aim of this study was to investigate the preoperative clinical and radiological factors that predict the development of a postoperative IAA in patients with AA who were treated by laparoscopic appendectomy (LA). : Two hundred and sixteen patients with pathologically proven AA underwent LA between January 2013 and March 2018 in our department.

Transmesenteric hernia with two mesenteric defects in an adult.

Transmesenteric hernia is a rare cause of small bowel strangulation in adults and, to our knowledge, no one has reported the existence of two mesenteric defects in an adult. Our patient was a 73-year-old Japanese woman who presented to our emergency department complaining of abdominal pain and nausea. Computed tomography with contrast enhancement revealed a closed loop obstruction in the pelvis, suggesting small bowel strangulation due to an internal hernia.

Is postponed laparoscopic appendectomy justified for patients with acute appendicitis?

Introduction: Recent meta-analyses revealed that laparoscopic appendectomy (LA) is a feasible procedure even for patients with complicated appendicitis. More than a few patients with acute appendicitis arrive at the hospital during night shifts and have their operation postponed for various reasons. However, the feasibility and disadvantages of this so-called "postponed laparoscopic appendectomy" (PLA) remain controversial.

Calculus left in remnant gallbladder cause long-term complications in patients undergoing subtotal cholecystectomy.

Background: There have been only a few reports that describe the long-term outcomes of Subtotal cholecystectomy (SC).

Methods: A total of 59 patients underwent "reconstituting" SC at our hospital between January 2005 and July 2017. In the 59 patients, risk factors for long-term complications were analyzed.

[A Case of Advanced Squamous Cell Lung Cancer with Hemodialysis Treated with Carboplatin and Paclitaxel].

We herein describe a patient on hemodialysis with advanced squamous cell lung cancer who was treated with chemotherapy that consisted of carboplatin(CBDCA)and paclitaxel(PTX). A 54-year-old man who was undergoing a routine hemodialysis for chronic renal failure presented with cold symptoms and was prescribed antibiotics.As no symptomatic improvement was achieved, he was referred to the Department of Internal Medicine in our hospital, where computed tomographic scan findings raised the suspicion of lung cancer.

Case of reduction en masse who presented with no symptoms.

The early and accurate diagnosis of reduction en masse followed by proper treatment is important but has been difficult. Here, we report the case of a 58-year-old Japanese man who presented with abdominal pain and vomiting at a nearby clinic. He was referred to our hospital on suspicion of small bowel obstruction.

Outcomes of early versus delayed laparoscopic cholecystectomy for acute cholecystitis performed at a single institution.

Introduction: Debate continues regarding the clinical outcomes of early laparoscopic cholecystectomy (ELC) versus delayed laparoscopic cholecystectomy (DLC) for acute cholecystitis (AC). The aim of this retrospective study was to compare clinical outcomes of ELC and DLC.

Methods: This study consisted of 465 patients who had undergone laparoscopic cholecystectomy for AC between January 2000 and February 2017.

Is postponed laparoscopic cholecystectomy justified for acute cholecystitis appearing early after onset?

Introduction: Early laparoscopic cholecystectomy (ELC) is considered the standard treatment for acute cholecystitis for patients who can tolerate surgery. The ideal time for performing ELC is reported to be 72 h from onset. However, many patients undergo surgery on or after the fourth day from onset, even if they presented early after onset.

Elective laparoscopic repair after reduction might be useful strategy for incarcerated obturator hernia: a case report.

Obturator hernia is a rare clinical condition that causes intestinal obstruction. Recent reports have suggested that laparoscopic repair may be useful for incarcerated obturator hernia in select patients. The patient was a 64-year-old female who presented to our emergency department with a chief complaint of abdominal pain.