The Clinicopathological Assesment of the Spread Mechanism for Carcinoma in the Lower Portion of the Rectum.

概要

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To evaluate the spread mechanism of the carcinoma in the lower portion of the rectum, 39 cases that had undergone operation of curative resection in our department during 1980 to 1990 were reviewed, assesed and divided into 3 groups. The three groups are, 9 cases with recurrence, 13 cases without recurrence for more than 5 years, and 17 cases with no recurrence having a post operative period not exceeding 5 years.<BR>Submucosal lymphatic and venous invasion did not have any relation with recurrence respectively, whereas subserosal lymphatic and venous invasion, lymph node metastasis, and perineural invasion, did have a positive relation respectively. In the lower portion of the rectum the serosal membrane dose not exist, but for convenience the adventitia will be mentioned as the serosal membrane in the following. Perineural invasion was found to have no relation with lymphatic and venous invasion and it was noticed to be a prognosis factor by itself. Also through a retrospective study of the operative method done in our department, any case that the depth of the tumor is a<SUB>2</SUB>, may be suggested that any adjuvant therapy, for instance radiation therapy, is need.
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