The problem of de novo colorectal carcinoma.
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).
Kudo
S
S
Division of Gastroenterology, Akita Red Cross Hospital, Japan.
Tamura
S
S
Hirota
S
S
Sano
Y
Y
Yamano
H
H
Serizawa
M
M
Fukuoka
T
T
Mitsuoka
H
H
Nakajima
T
T
Kusaka
H
H
D000236:Adenoma / Q000473:pathology*; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000473:pathology*; D018450:Disease Progression; D006801:Humans; D009361:Neoplasm Invasiveness