title: [Conventional rectoscopy or fibrosigmoidoscopy. Comparison of methods].
mesh_terms: D005336:Fiber Optic Technology; D006801:Humans; D011351:Proctoscopy / Q000379:methods*; D012002:Rectal Diseases / Q000175:diagnosis; D012004:Rectal Neoplasms / Q000175:diagnosis; D012812:Sigmoidoscopy / Q000379:methods*
vernacular_title: Rectoscopia convencional o fibrosigmoidoscopia. Comparación de métodos.