Gastric-Type Extremely Well-Differentiated Adenocarcinoma of the Stomach: A Challenge for Preoperative Diagnosis

Gastric-type extremely well-differentiated adenocarcinoma (EWDA) is a rare type of gastric adenocarcinoma characterized by infiltration of well-formed mucinous glands with little or no nuclear atypia, which resemble foveolar epithelium or pyloric glands. Because of its high degree of differentiation, preoperative biopsy diagnosis of gastric-type EWDA is very difficult. We encountered a case of gastric-type EWDA, manifesting as a Borrmann type 4 lesion, in a 47-year-old man. Despite four repeated biopsies, the preoperative biopsy diagnosis was not conclusive due to the scarcity of diagnostic tumor cells and lack of knowledge regarding the unusual histologic findings of gastric-type EWDA. We herein describe the histologic findings of gastric-type EWDA in detail, with the aim of facilitating a preoperative biopsy diagnosis and understanding of this rare type of gastric adenocarcinoma.

A Case of Colon Cancer Coexisting with Colonic Tuberculosis and This Presented as Bowel Perforation / 대한소화기내시경학회지

Tuberculosis can involve any part of the body and there are case reports of tuberculosis coexisting with malignancy in most body organs. However, cases of intestinal tuberculosis associated with colon cancer have rarely reported. Inflammatory bowel diseases can progress to malignant diseases due to mucosal dysplastic change. Similarly, intestinal tuberculosis can cause chronic inflammation, but the exact relationship between intestinal tuberculosis and colon cancer is currently obscure. A 71-year-old woman visited our hospital because of abrupt right lower abdominal pain that progressed to rebound tenderness and abdominal rigidity. Abdominal computed tomography showed a polypoid mass in the cecum and a distended terminal ileum. Right hemicolectomy was performed and the surgical specimen revealed extremely well differentiated adenocarcinoma combined with intestinal tuberculosis and bowel perforation in the cecum. We report here on a rare case of colon cancer coexisting with colonic tuberculosis and this presented as bowel perforation. We also include a review of the relevant literature.