title: In vivo observation of the ileal microadenoma in familial adenomatous polyposis.
abstract: Microadenomas or aberrant crypt foci (ACFs) are regarded as early neoplastic lesions that precede the development of macroscopic adenomas. The aim of this study was to characterize surface features of ileal microadenomas in patients with familial adenomatous polyposis (FAP). Magnifying ileoscopy was performed in 19 patients with FAP. A histologically verified adenomatous tubule, the existence of which was suggested by magnified observation, was regarded as a microadenoma. Magnifying ileoscopy detected microadenoma in five patients. In four of the five cases, the ileal microadenomas were identified as areas with tiny crypt openings or serrated surfaces, which were distinctive of nonneoplastic, diminutive protrusions. Magnifying ileoscopy seems to be useful in the detection of ileal microadenomas.
authors.affiliation: Department of Medicine, Kawasaki Medical School, Kurashiki-City, Okayama, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Matsumoto
authors.forename: M
authors.initials: M
authors.lastname: Iida
authors.forename: M
authors.initials: M
authors.lastname: Mizuno
authors.forename: M
authors.initials: M
authors.lastname: Shimizu
authors.forename: S
authors.initials: S
authors.lastname: Nakamura
authors.forename: M
authors.initials: M
authors.lastname: Fujishima
mesh_terms: D000236:Adenoma / Q000473:pathology*; D011125:Adenomatous Polyposis Coli / Q000473:pathology* / Q000601:surgery; D000328:Adult; D000368:Aged; D001706:Biopsy; D003082:Colectomy; D020685:Colonoscopes; D004396:Coloring Agents; D016099:Endoscopy, Gastrointestinal; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007078:Ileal Neoplasms / Q000473:pathology*; D007203:Indigo Carmine; D007413:Intestinal Mucosa / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011159:Population Surveillance; D011230:Precancerous Conditions / Q000473:pathology*; D012004:Rectal Neoplasms / Q000473:pathology; D013274:Stomach Neoplasms / Q000473:pathology
chemical_list: D004396:Coloring Agents; D007203:Indigo Carmine