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Pelvic CT examination was performed in preoperative 40 patients and postoperative 51 patients of the distal colonic and rectal carcinoma. CT study expect for the decision of the depth of invasion and the detection of lymphnode metastasis, or the location of recurrence.<BR>Diagnostic accuracy rate of the depth of invasion was 68.6% in tumors of sigmoid colon, rectosigmoid, and upper rectum, and 78.9% in lower rectum, and anal canal. These rate were superior to those of selective angiographic examination.<BR>Diagnostic accuracy rate for lymphnode metastasis was 73.0%. CT examination could define the lymphnode swelling, but could not define if those were metastasis or not. Furthermore, CT-angiography was beneficial for the estimation of the depth of invasion.<BR>The differentiation between local recurrent tumor and granulomatous mass in the perineum after abdomino-perineal resection is the most important problem, however, the further studies are necessary to obtain the definite criteria of differential diagnosis.<BR>Above results support that CT examination should be used routinely in the distal colonic and rectal cancer patients.
日本大腸肛門病学会の論文