i C Background columnar ciliated epithelium, more commonly present WORLD JOURNAL OF SURGICAL ONCOLOGY

Full list of author information is available at the end of the articleDuplications of the alimentary tract are relatively rare congenital anomalies. Those located in the stomach are very uncommon, constituting between 4 and 9 % of all intestinal duplications [1]. The structure of a gastric du-plication cyst (GDC) consists of a smooth muscle coat lined by a mucous membrane, in most cases containing a typical gastric epithelium [2], although a small intes-tinal or colonic mucosa may also be present. Generally, they are single and do not communicate with gastric lumen. Exceptionally, in GDCs a pseudostratified in the esophageal duplication cysts, can be found. According to Cunningham and colleagues [3], GDCs lined by pseudostratified columnar ciliated epithelium could be better defined as foregut duplication cysts (FDCs) of the stomach. Diagnosis of a gastric duplication may be difficult even using the most advanced imaging techniques, including endoscopic ultrasound (EUS) [4-6]. Here we report a case of GDC with respiratory epithelium, misdiagnosed as a gastrointestinal stromal tumor (GIST) at EUS. The EUS-guided fine-needle aspiration subsequently performed led to a definite preoperative diagnosis, * Correspondence