RT Journal Article SR Electronic T1 An 87-year-old man with a tympanic abdominal mass JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 475 OP 475 DO 10.1503/cmaj.1040799 VO 172 IS 4 A1 Dmitry Guller A1 David Bach YR 2005 UL http://www.cmaj.ca/content/172/4/475.abstract