Publications by authors named "Nobuhiro Nitori"

Introduction: Ileorectal fistulas following sigmoid colon vaginoplasty are rare. Reports on the management of the surgical complications of sex reassignment operations among transgender patients are few.

Presentation Of Case: A 40-year-old patient with a male-to-female sex identity disorder underwent sigmoid vaginoplasty for sex reassignment 4 months prior to presentation.

View Article and Find Full Text PDF
Article Synopsis
  • Pancreatic serous neoplasms are uncommon tumors, often benign, but distinguishing between benign (cystadenoma) and malignant (cystadenocarcinoma) forms can be challenging.
  • A case is presented involving a woman in her 60s who was diagnosed with serous cystadenoma; after resection, she was monitored for seven years, during which liver metastasis developed.
  • The diagnosis of metastatic serous cystadenocarcinoma was confirmed through imaging and subsequent liver surgery, highlighting specific imaging features that could aid in diagnosing this cancer with liver spread.
View Article and Find Full Text PDF

The present study aimed to investigate whether side-to-end anastomosis could provide an improved surgical outcome, such as lower anastomotic leakage rate, compared with end-to-end anastomosis, following anterior resection for rectal and rectosigmoid cancer. This retrospective study included 162 patients with rectal cancer who underwent elective anterior resection between January 2012 and October 2019 at a single institution. Patients with double cancers or colonic J-pouch were excluded.

View Article and Find Full Text PDF

A 56-year-old man diagnosed with sigmoid colon cancer underwent sigmoid colectomy. Nine months later, his serum carcinoembryonic antigen (CEA) level had increased, and the diagnosis of recurrent peritoneal dissemination was made based on positron emission tomography/computed tomography (PET/CT) findings. Although systemic chemotherapy comprising S-1 and oxaliplatin (SOX) plus bevacizumab was initiated, severe diarrhea occurred on day 4 of the second cycle despite reduction in S-1 dose.

View Article and Find Full Text PDF

Introduction: Spigelian hernia (SH) is a rare ventral hernia occurring near the lateral border of the rectus muscle. The treatment remains controversial and depends on institutional expertise. Although laparoscopic surgery is a good adaptation for the repair of ventral hernias, only a few cases have been reported in the literature.

View Article and Find Full Text PDF

Introduction: The lateral approach is the standard for laparoscopic splenectomy. However, when the modified Hassab's operation is performed laparoscopically, the patient is placed in the supine position and then the right semi-lateral or lateral decubitus position. Based on our experience with laparoscopic adrenalectomy and splenectomy, we laparoscopically performed the modified Hassab's operation with the patient in the right lateral decubitus position.

View Article and Find Full Text PDF

Purpose: We developed a new technique, sutureless mesh fixation, using 2-octyl cyanoacrylate (Dermabond, a surgical tissue adhesive) for incisional hernia repair. The objective of this article is to introduce the new technique and to examine whether the technique provides sufficient resistance to abdominal pressure.

Methods: We conducted two tests using a porcine model, a traction experiment and artificial pneumoperitoneum test.

View Article and Find Full Text PDF

Background/aims: This study was to examine the utility of a modified double-stapling end-to-end gastroduodenostomy method ('Tornado' anastomosis) compared to a method with an additional gastrotomy ('Anterior Incision' method) in laparoscopy-assisted distal gastrectomy.

Methodology: Forty-two patients with gastric cancer who underwent laparoscopy-assisted distal gastrectomy were analyzed retrospectively. Billroth-I using an additional gastrotomy was performed in 24 patients (AI group) and Billroth-I without an additional gastrotomy was performed in 18 (TOR group).

View Article and Find Full Text PDF

Non-occlusive mesenteric ischemia (NOMI), leading to intestinal gangrene without a demonstrable occlusion in the mesenteric artery, is a rare condition with extremely high mortality. We report a case of NOMI diagnosed preoperatively by computed tomography and treated successfully with surgery, assisted by indocyanine green (ICG) fluorescence in the HyperEye Medical System (HEMS), a new device that can simultaneously detect color and near-infrared rays under room light. This allowed for precise intraoperative evaluation of the mesenteric and bowel circulation.

View Article and Find Full Text PDF

We report a case of anal cancer in a 58-year-old woman who complained of narrow, bloody stools and anal pain. Physical examination revealed anal stenosis associated with a circular mass arising in the anal canal. Histological examination of biopsy specimens confirmed a diagnosis of moderately differentiated squamous cell carcinoma.

View Article and Find Full Text PDF

A 78-year-old Japanese man with a history of colon cancer was referred to our department of neurosurgery for the management of asymptomatic left chronic subdural hematoma (CSDH). He was receiving bevacizumab therapy for colon cancer, and the size of the CSDH increased or decreased depending on bevacizumab administration. Simple drainage was performed because of the risk of a critical increase in the size of CSDH during bevacizumab therapy, but since the CSDH was organized and firm, the drainage was insufficient.

View Article and Find Full Text PDF

In Japan, the first gastro camera was introduced as a trial in 1950, and has improved continuously. On the other hand, in Europe, it was earlier that the first laparoscopic examination was tried in 1901 by Kelling. After that, laparoscopic surgery was developed by originating in a gynecologic surgery.

View Article and Find Full Text PDF

Purpose: This prospective study was conducted to clarify the association between the short-term outcome of laparoscopic colorectal surgery and visceral obesity (VO) based on waist circumference (WC).

Methods: WC and body mass index (BMI) were preoperatively measured in 98 consecutive patients with colorectal cancer undergoing laparoscopic surgery between June 2004 and February 2006. VO was defined as both BMI >or=25 kg/m2 and WC >or=85 cm in male patients, or WC >or=90 cm in female patients.

View Article and Find Full Text PDF

Background: Peroxisome proliferator-activated receptor-gamma (PPARgamma) is a member of the steroid receptor superfamily. Liganded PPARgamma can inhibit cancer cell proliferation. The in vitro and in vivo inhibitory effect of the synthetic ligands, ciglitazone (CGZ) and pioglitazone (PGZ), on human colon cancer was investigated.

View Article and Find Full Text PDF

Tissue factor (TF) is a transmembrane glycoprotein that plays roles in the blood coagulation and intracellular signaling pathways, and has also been suggested to modulate the biological behavior of cancer cells. In order to examine the clinicopathologic significance of TF expression in pancreatic ductal adenocarcinoma, TF expression was determined by immunohistochemistry using a newly raised anti-TF monoclonal antibody in 113 patients who had undergone surgical resection of pancreatic ductal adenocarcinoma. According to the incidence of tumor cell immunopositivity, patients were divided into "negative TF" (0%), "weak TF" (<25%), or "high TF" (25% or more) groups, which accounted for 11.

View Article and Find Full Text PDF