Persistent perineal fistulae after abdominoperineal coloproctectomy.
D000368:Aged; D005260:Female; D005402:Fistula / Q000209:etiology* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D010502:Perineum / Q000601:surgery; D011183:Postoperative Complications; D012007:Rectum / Q000601:surgery*