title: Small depressed neoplasms of the large bowel: radiographic visualization and clinical significance.
abstract: Small depressed and flat neoplasms (small flat adenomas) exist-in the large bowel and in the stomach. Most have been detected with colonoscopy. We tried to delineate these lesions radiographically. Radiographically, the contour of the lesions measuring 5 mm and less was visualized in 32 (60.4%) of 53 lesions. Radiographic examination preceded colonoscopy in 23 (71.9%) of these lesions. Ten (83.3%) of 12 lesions measuring 6-10 mm were visualized. The central depression was clearly delineated in 32 (60.4%) of 53 lesions measuring 5 mm and less and in 5 of the 12 (41.7%) lesions measuring 6-10 mm. The central depression was not demonstrated in all lesions whose contours were not visualized. The clinical significance of the small depressed neoplasm lies in the fact that a certain number may be a precursor of rapidly growing carcinoma with early submucosal invasion.
authors.affiliation: Central Clinic of the Foundation for the Detection of Early Gastric Cancer, Tokyo, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Fujiya
authors.forename: M
authors.initials: M
authors.lastname: Maruyama
mesh_terms: D000236:Adenoma / Q000000981:diagnostic imaging* / Q000473:pathology; D001466:Barium Sulfate; D002277:Carcinoma / Q000000981:diagnostic imaging* / Q000473:pathology; D003106:Colon / Q000473:pathology; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D003287:Contrast Media; D004733:Enema; D006801:Humans; D011859:Radiography; D012007:Rectum / Q000473:pathology
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate