1993 Volume 43 Pages 255-258
A 41-year-old male, presented here, had six minute colonic neoplasms of superficial type with depression. He was admitted because of abdominal pain. Colonoscopy revealed four minute lesions with obvious depression in the sigmoid colon. Another minute lesion with depression was detected in the transverse colon by the second examination. Twelve months later, the other lesion was found in the transverse colon.
All six lesions were removed by means of endoscopic mucosal resection, and these samples were examined by stereomicroscope, and then histopathologically. The lesions were 2 to 5 mm in size, which were consisted of two IIc, one IIc+IIa, two IIa+IIc, and one (IIa+IIc) ′. We define (IIa+IIc) ′as a relatively depressed lesion whose elevated margin is not neoplastic. One lesion was adenocarcinoma, and the others were adenomas with moderate to severe atypia.
During the past three years, we experienced 42 cases (60 lesions) who had minute colorectal neoplasms of superficial type with depression. Among them, each of 11 cases had two or more neoplasms. Twenty one of the 60 neoplasms were diagnosed as adenocarcinomas. Careful examination and vigorous follow-up study are recommended, since minute colorectal neoplasms of superficial type with depression can be multiple and malignant.
