title: Postoperative acalculous gangrenous cholecystitis.
mesh_terms: D000368:Aged; D002764:Cholecystitis / Q000209:etiology* / Q000601:surgery; D003082:Colectomy; D005260:Female; D005734:Gangrene / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications