Koji Masumori

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BACKGROUND Transanal endoscopic microsurgery facilitates access to proximal tumors in the rectum, but there is limited possibility for tumors above the peritoneal reflection because of high cost, training, and long operative time. The objectives of this study are to delineate the results achieved by novel transanal local excision (minimally invasive(More)
Most carcinoid tumors of the rectum are confined to the submucosa with a size less than 1-2 cm and are usually suitable for local excision, as metastasis to the regional nodes is limited. Endoscopic excision of carcinoid tumors has been performed for this entity as a least invasive method but incomplete resection and/or unclear surgical margin and(More)
INTRODUCTION Anastomotic surgical recurrence after bowel resection is a major problem in patients with Crohn's disease. The aim of this prospective observational study was to evaluate the efficacy of a novel technique for restoring bowel continuity after resection involving either the small or the large intestine. METHODS The first case was instructed by(More)
We investigated both pathogenesis and prevention of loop transverse stomal prolapse. Seven patients with reducible prolapsed stoma were studied under fluoroscopy after staining the prolapsed stoma and the colon by barium medium while prolapsing or reducing the stoma with or without the stomal wall pressed on to the abdominal wall of fascial plane. All(More)
PURPOSE This study was designed to identify those patients with Dukes C rectal carcinoma below the peritoneal reflection who might benefit from lateral lymph node dissection. METHODS The study involved 104 consecutive Dukes C patients who received total mesorectal excision with lateral lymph node dissection for rectal carcinoma below the peritoneal(More)
Enterocele is often associated with other pelvic floor disorders but it is not always possible to detect by clinical examination. Defecography with peritoneography and/or barium meal intake has recently been developed as a new method to identify enterocele, but this method is an invasive procedure. Multislice computed tomography was performed at rest and(More)
Solitary fibrous tumors (SFTs) develop most commonly in the pleura, although they have occasionally been reported to arise in the pelvic cavity. We report a case of an SFT presenting as a painless nodule in the pelvis of a 56-year-old woman. Histologically, the tumor was composed of spindle-shaped cells arranged without pattern, with short and narrow(More)
We reviewed clinical records of 11 cases with preoperative chemoradiotherapy to evaluate the clinical effectiveness of chemoradiotherapy for T4 rectal cancer. The preoperative radiotherapy consisted of 40-50 Gy delivered in fractions of 1 .8- 2.0 Gy per day, five days per week. A treatment of 5-fluorouracil, 500 mg/body per day intravenously, or oral UFT-E(More)
Stomal prolapse is one of the common complications in transverse colostomy and can be managed conservatively in most cases; however, laparotomy and reconstruction of the stoma may sometimes be required, especially in case of irreducible colostomy prolapse. We have reported a simple local repair with reconstruction of the loop colostomy. We herein report a(More)