title: Polypoid lesions at the anal canal: what do they hint?
authors.affiliation: Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Shu Chen
authors.initials: SC
authors.lastname: Wei
authors.affiliation: Department of Surgery, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Been Ren
authors.initials: BR
authors.lastname: Lin
authors.affiliation: Department of Pathology and Forensic Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Chia Tung
authors.initials: CT
authors.lastname: Shun
authors.affiliation: Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Jau Min
authors.initials: JM
authors.lastname: Wong