A CASE OF CARCINOMA OF THE SIGMOID COLON APPEARING DIFFUSELY INFILTRATING CARCINOMA

Abstract

A 53-year-old man was seen at Matsue Red Cross Hospital with the chief complaint of abdominal full sensation. Barium enema examination revealed a narrowing and irregularity of the wall, 8 cm in length, in the sigmoid colon. Colonoscopy demonstrated a narrowing stricture with edematous mucosa. The biopsy specimens obtained only from a fissuring demonstrated well differentiated adenocarcinoma. The resected specimen showed a poorlydefined elevated lesion, 7 × 3cm in size, with a coarsely granular appearance of the mucosa surrounded by converging folds. Most of the tumor was covered with noncancerous tissue. Histologically normal colonic mucosa was present in the submucosa involved by tumor.