Appendicovesicocolic fistula.
D001065:Appendix; D002429:Cecal Diseases / Q000209:etiology; D003108:Colonic Diseases / Q000209:etiology*; D006801:Humans; D007412:Intestinal Fistula / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D001747:Urinary Bladder Fistula / Q000209:etiology*