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