A case of analgesia due to stretching a mucosal bridge between the anastomotic site and the anus following low anterior resection was presented. A 57-year-old male underwent low male anterior resection for rectal cancer in 1986, and a minor leakage of the anastomoitic site was treated conservatively. His analgesia started after discharge. Anastomotic stenosis was treated by bougie and strictureplasty in 1987 and 1989 respectively. Analgisia subsided transiently, but persisted. He consulted our clinic due to increasing anal pain on defecation. Digital examination revealed tenderness of the posterior wall of the rectum distal to the anastomotic site. Colonoscopic examination revealed a mucosal bridge between the anastomotic site and the anus, and pain was evoked by touching the mucosal bridge. Mucosal bridge was transected and resutured longitudinally. Analgesia disappeared postoperatively, and no pain has recurred 8 months after operation.
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