title: Case 39-2016: A Man with a History of Prostate Cancer and Recent Rectal Bleeding.
authors.affiliation: Massachusetts General Hospital, Boston, MA
authors.forename: Theodore S
authors.initials: TS
authors.lastname: Hong
authors.affiliation: Massachusetts General Hospital, Boston, MA
authors.forename: Jill N
authors.initials: JN
authors.lastname: Allen
authors.affiliation: Massachusetts General Hospital, Boston, MA
authors.forename: Paul C
authors.initials: PC
authors.lastname: Shellito