Immature Gastric Teratoma with Rhabdomyosarcomatous and Primitive Neuroectodermal Tumor Components in an Adult Patient: A Case Report

Teratomas of the stomach are extremely rare, comprising only about 1% of all teratomas in the pediatric population [1,2]. The majority of cases are mature teratomas with less than two dozen reported cases of immature gastric teratoma [2-4]. Most reported gastric teratomas occur in the pediatric population and less commonly in adults. The most common location is the posterior wall or greater curvature of the stomach [5,6]. Rare cases of gastric teratoma have been reported on the wall of the cardiac orifice of an adult [7] and the lesser curvature [5,8,9]. Clinically, patients can present with an abdominal mass, vomiting, and gastrointestinal bleeding [10,11]. Computed tomography (CT) findings of gastric teratomas may include calcifications in solid cystic masses [5]. Here, we report a case of an immature teratoma in a 55-year-old man who presented with melena and epigastric abdominal pain. To the best of our knowledge, this is the first case of immature teratoma with no associated gastric carcinoma or mature teratoma components in an adult. Case Report