Proctosigmoidoscopic examinations.
D005770:Gastrointestinal Neoplasms / Q000175:diagnosis*; D006801:Humans; D008722:Methods; D011351:Proctoscopy; D012002:Rectal Diseases / Q000175:diagnosis; D012004:Rectal Neoplasms / Q000175:diagnosis; D012812:Sigmoidoscopy