[Distal endoscopy].
D004724:Endoscopy; D006801:Humans; D009369:Neoplasms / Q000175:diagnosis*; D012004:Rectal Neoplasms; D012007:Rectum; D012812:Sigmoidoscopy
NEOPLASMS/diagnosis; RECTUM/neoplasms; SIGMOIDOSCOPY
Endoscopia distal.