Colo-anal anastomosis as surgical procedure for low rectal tumors was analysed in regard of complication rate, functional and oncological results. The sensibility of the method particularly in tumors near the anal sphincters, was assessed by means of a new radiological procedure (lateral distant view). From 1982 to 1985 colo-anal anastomosis was performed in 30 patients with rectal carcinoma. All tumors were within reach of the palpating finger. Tumor distance from the anal verge was measured endoscopically (6.4 +/- 1.5 cm) and radiologically (9.3 +/- 1.7 cm) (x +/- SD). The complication rate was comparable to that after anterior resection with conventional anastomosis. Inspite of problems with high frequency in the first months after surgery, all patients were satisfied with the functional result of the operation. Frequency decreased within a year to 4 stools/day. At present a reliable evaluation of the oncological results cannot yet be established.
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