adenocarcinoma of anal canal的用法和样例：
- Objective To investigate the clinical features and treatment of anal canal adenocarcinoma.
- The longitudinal muscle and the intern al anal sphincter in front of the upper part of anal canal were found to be blen ded with the perineal body.
- Objective To observe the efficacy of the treatment of anal canal scar resection and anastomosis and loose solution method to perianal skin flap in treating anorectal stenosis.
- Methods: retrospective analysis were made on the clinical datum of patients who have anal fissure, mixed hemorrhoid, and stenosis of anal canal respectively.