title: [Radiological findings of cancerous invasion in colorectal cancer less than 3 cm in diameter].
abstract: 131 colorectal cancers, less than 3 cm in diameter, experienced at Juntendo University Hospital in Oct. 1977 through Dec. 1988 were studied with respect to their radiological and macroscopic features. Macroscopic features of the cancers were classified into type a (a lesion with a long stalk), type b (a subpedunculated or sessile lesion), type c (a plaque-like lesion) and type d (a lesion with a depression). Type a is early cancer. An early cancer of type b was mostly demonstrated as a lobular pattern of tumor surface, and an advanced cancer as a nodular pattern. Type c less than 1 cm in diameter was seen a sm cancer. A sm cancer of type d was mostly demonstrated as a faint barium fleck of the depression, an advanced cancer as a mild barium fleck. By deformed colonic wall in profile view, an early cancer was mostly demonstrated as a thorn shape deformity, sm or pm cancer as an arch shaped deformity and a cancer with deeper cancerous invasion than pm as a trapezoid deformity.
authors.forename: M
authors.initials: M
authors.lastname: Matsukawa
authors.forename: Y
authors.initials: Y
authors.lastname: Usui
authors.forename: T
authors.initials: T
authors.lastname: Negoro
authors.forename: T
authors.initials: T
authors.lastname: Kan
authors.forename: K
authors.initials: K
authors.lastname: Kondou
authors.forename: S
authors.initials: S
authors.lastname: Yamada
mesh_terms: D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D011859:Radiography