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Vascular Patterns of Villous Tumors of the Colorectum


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Title: Vascular Patterns of Villous Tumors of the Colorectum
Authors: Shimoyama, Takatoshi / Shimizu, Teruhisa / Kusano, Hiroyuki / Nanashima, Atsushi / Uchikawa, Tetsuya / Matsuo, Seiji / Azuma, Kohji / Honjo, Seiji / Hisano, Hiroshi / Kida, Harumi / Yoshida, Ryuichiro / Nakagoe, Tohru / Miura, Toshio / Tomita, Masao / Kawaguchi, Akio
Issue Date: 25-Oct-1994
Citation: Acta medica Nagasakiensia. 1994, 39(1-3), p.172-175
Abstract: In order to more fully understand the morphological characteristics of villous tumors of the colorectum, the vascular patterns of six colorectal resection specimens were microangiographically studied. Grossly, villous adenomas were of two main types: pedunculated polyps and carpet-like lesions. Pedunculated villous adenomas had many large stalk vessels in a broad short pedicle, representing a large blood supply to the tumor. The carpet-like lesions were composed of continuous clusters of polyps with stalk vessels and the flat elevated lesions among polyps and at the periphery showed similar vascular patterns to the mucosa of normal colon. In lesions with cancer invasive to the proper muscle layer, scattered ulcerations due to the destruction of polyps were also observed, corresponding to at least a Dukes B lesion. The above findings could represent very important additional information for endoscopic treatment or local excision for the prevention of hemorrhagic complicatios or incomplete removal of tumor.
Keywords: villous tumor of the colorectum / pedunculated / polyp / carpet-like lesion / microangiography
URI: http://hdl.handle.net/10069/15996
ISSN: 00016055
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 39, No. 1-3

Citable URI : http://hdl.handle.net/10069/15996

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