I. Colorectal Benign Non-epithelial Tumors

概要

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From 1968 to August, 1977, 10 cases of colorectal non-epithelial tumors were experienced at our institute. They included two cases of leiomyomas, four cases of lipomas, and a case of benign lymphoma, pneumastosis cystoides and two cases of endometriosis.<BR>Leiomyomas, which located in the rectum, were diagnosed preoperatively by means of rectal biopsies.<BR>Three of four cases of lipomas, which located in the transverse colon, were examined endoscopically. Although the characteristic endoscopic appearances of the lipomas are said to be smooth, soft and pliable consistency with normal overlying mucosa, two of three cases showed shallow ulceration and reddness over the mass, that resulted in macroscopic resemblance to adenomatous polyps. When the lower half of the mass was smooth with shallow irregular ulceration on the upper half, endoscopic diagnosis of lipoma rather than adenomatous polyp was suggested. Endoscopic diagnosis of lipomas were difficult without careful observation. One of the lipomas was successfully removed via the colonoscope. The endos-copic removal may be very useful for diagnosis and treatment in selected cases of the nonepithelial tumors.
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