Colon and rectal lesions: a tutorendoscopic view.
D003110:Colonic Neoplasms / Q000175:diagnosis*; D003107:Colorectal Surgery / Q000193:education*; D004504:Education, Medical, Undergraduate; D006801:Humans; D008961:Models, Structural; D010781:Photography; D012004:Rectal Neoplasms / Q000175:diagnosis*; D012812:Sigmoidoscopy