Synchronous primary adenocarcinoma and gastrointestinal stromal tumor in the stomach: A report of two cases - BİRCAN, Sema; CANDIR, Özden; AYDIN, Şerife; BAŞPINAR, Şirin; BÜLBÜL, Mahmut; KAPUCUOĞLU, Nilgün; KARAHAN, Nermin; ÇİRİŞ, Metin (Turkish Journal of Gastroenterology, 2004)