RT Journal Article SR Electronic T1 Management of a small incidentally discovered retroperitoneal synovial sarcoma JF Canadian Journal of Surgery JO CAN J SURG FD Canadian Medical Association SP E199 OP E200 VO 52 IS 5 A1 Ilias P Gomatos A1 Leonidas Alevizos A1 Georgia Kafiri A1 John Bramis A1 Emmanouel Leandros YR 2009 UL http://canjsurg.ca/content/52/5/E199.abstract