Published online Sep 15, 2000. doi: 10.3748/wjg.v6.iSuppl3.73
Revised: March 12, 2000
Accepted: July 10, 2000
Published online: September 15, 2000
AIM: To study the biopathologic characteristics of the transitional mucosa (TM) adjacent to rectal carcinoma and the resecting length of bowel.
METHODS: Immunohistochemical and mucin histochemical methods were used in 81 cases to observe the expression of PCNA and the changing regulations of TM adjacent to rectal carcinoma.
RESULTS: The PCNA expression rate was the highest in cancer and gradually decreased in atypical dysplasia, TM and normal mucosa (P < 0.01). The range of TM adjacent to the mucinous adenocarcinoma was more extensive than that to the papilla adenocarcinoma and the tubular adenocarcinoma (P < 0.01). The range of TM adjacent to the rectal carcinoma in Dukes C stage was more extensive than that in stage A, B (P < 0.01, P < 0.05).
CONCLUSION: The TM of rectal carcinoma possesses certain potential of malignancy. The range of TM adjacent to rectal carcinoma is closely related to the pathological type and advancement of rectal carcinoma.