title: Idiopathic colonic ulcer: report of a case diagnosed preoperatively.
mesh_terms: D001706:Biopsy; D003108:Colonic Diseases / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D004724:Endoscopy; D005336:Fiber Optic Technology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012812:Sigmoidoscopy; D013997:Time Factors; D014456:Ulcer / Q000175:diagnosis / Q000473:pathology / Q000601:surgery