title: The problem of de novo colorectal carcinoma.
abstract: From April 1985 to March 1995, colonoscopy was carried out at our institution in 24,059 patients, 31,800 times in symptomatic and/or asymptomatic average risk persons. 184 submucosal invasive carcinomas were detected. Unlike protruding-type lesion, the depressed-type invades the submucosal layer, even though the size is within 10 mm. The depressed type of invasive carcinoma accounted for 20 lesions, and represented 10.9% (20 of 184) of all the invasive carcinomas. The pit pattern of depressed-type lesions shows a small round pit (type IIIs pit pattern) and that of carcinoma lesions shows the irregular pit and non-structure (type V pit pattern).
authors.affiliation: Division of Gastroenterology, Akita Red Cross Hospital, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Kudo
authors.forename: S
authors.initials: S
authors.lastname: Tamura
authors.forename: S
authors.initials: S
authors.lastname: Hirota
authors.forename: Y
authors.initials: Y
authors.lastname: Sano
authors.forename: H
authors.initials: H
authors.lastname: Yamano
authors.forename: M
authors.initials: M
authors.lastname: Serizawa
authors.forename: T
authors.initials: T
authors.lastname: Fukuoka
authors.forename: H
authors.initials: H
authors.lastname: Mitsuoka
authors.forename: T
authors.initials: T
authors.lastname: Nakajima
authors.forename: H
authors.initials: H
authors.lastname: Kusaka
mesh_terms: D000236:Adenoma / Q000473:pathology*; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000473:pathology*; D018450:Disease Progression; D006801:Humans; D009361:Neoplasm Invasiveness