title: Spontaneous duodenocolic fistula.
mesh_terms: D000328:Adult; D000749:Anemia, Megaloblastic / Q000209:etiology; D003108:Colonic Diseases / Q000150:complications*; D004378:Duodenal Diseases / Q000150:complications*; D006801:Humans; D007412:Intestinal Fistula / Q000209:etiology* / Q000601:surgery; D008297:Male