Familial adenomatous polyposis associated with gastrointestinal stromal tumor: Report of a case - BAŞSORGUN, Cumhur İbrahim and ÖZBUDAK, İrem Hicran and ERDOĞAN, Gülgün and ELPEK, Gülsüm Özlem and ERDOĞAN, Okan and GELEN, Tekinalp (Turkish Journal of Gastroenterology, 2012)