抄録
A 26-year-old-male consulted a doctor at Isuzu Hospital in October 1994 for evaluation of anemia. His mother had undergone gastro-colonic resection for gastrocolonic polyps. Twenty and several years later, she had undergone proctectomy for rectal cancer.
The hemoglobin was 9.5ｇ/dl. Occult blood was present in the stool. Endoscopic examination showed subpedunculated multiple polyps in the pyloric-antrum. Pathologic examination showed hyperplastic polyps. A barium enema and colonoscopy revealed 30-40 polyps which ranged in size from 0.3 to 4.0 cm in diameter and in morphology from sessile ones to pedunculated ones. Large polyps have a long stalk with marked lobulation. Microscapically the polypectomy specimens were interpreted as juvenile polyps. The largest polyp showed mixed features of juvenile polyp, adenomatous changes and cancer.
We though this is a suggestive case that the process of juvenile polyp's growing into a cancer.
