title: Colon filling defect.
authors.affiliation: Department of Diagnostic Radiology, St Mary's Hospital, Paddington, London, UK.
authors.forename: L
authors.initials: L
authors.lastname: Kreel
authors.forename: T
authors.initials: T
authors.lastname: Beale
mesh_terms: D012809:Colon, Sigmoid / Q000000981:diagnostic imaging*; D004241:Diverticulum, Colon / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007417:Intestinal Polyps / Q000000981:diagnostic imaging*; D008875:Middle Aged; D011859:Radiography; D012810:Sigmoid Diseases / Q000000981:diagnostic imaging*; D012811:Sigmoid Neoplasms / Q000000981:diagnostic imaging