title: Large, sessile mucosal polyps of the colon: the problem of repeatedly negative biopsies.
mesh_terms: D001706:Biopsy; D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000473:pathology; D005188:False Negative Reactions; D006801:Humans; D007417:Intestinal Polyps / Q000473:pathology*