[Endoscopic study of recto-sigmoid melanosis].
D012809:Colon, Sigmoid; D003108:Colonic Diseases / Q000175:diagnosis*; D006801:Humans; D008548:Melanosis / Q000175:diagnosis*; D012002:Rectal Diseases / Q000175:diagnosis*; D012812:Sigmoidoscopy
Etude endoscopique de la melanose recto-sigmoidienne.