Firat, O.Yazici, P.Makay, O.Aydin, A.Tuncyurek, M.Ersin, S.Guler, A.2019-10-272019-10-2720090001-5458https://hdl.handle.net/11454/42345Aim : To emphasize the importance of a detailed observation for incidental simultaneous tumoral masses during surgery for gastrointestinal stromal tumors (GISTs) at any location in the gastrointestinal system. Case presentations : Case 1 : a 39 years old female patient with an esophageal squamous cell carcinoma and a synchronous small intestinal GIST discovered incidentally during esophagectomy. Case 2 : a 73 years old female patient with a gastric GIST and a synchronous colorectal cancer detected incidentally during gastrectomy. In both cases, immunohistochemical examinations of the resected specimens confirmed the coexistences of GISTs and epithelial malignancies. Conclusion : The coexistences of GISTs with epithelial tumors have been increasing in recent years. In any case of a GIST or gastrointestinal adenocarcinoma, the surgeon should be alert to recognize a possible coexistent tumor with different histological origin.eninfo:eu-repo/semantics/closedAccessGastrointestinal stromal tumorGISTepitheliomaArticle1095629632WOS:00027218480001319994809N/A