DUODENAL STROMAL TUMOR WITH NEURAL DIFFERENTIATION

A 49-year-old woman was admitted to our hospital for detailed evaluati on of an abdominal mass. Ultrasonography and computed tomography revea led two tumors, one a submucosal lesion of the duodenal second portion and the other a left adrenal tumor. Angiography showed that the tumor s were hypervascular. Both tumors were removed surgically and examined histologically using hematoxylin-eosin staining. The duodenal tumor ( 10 x 6 X 5 cm) was initially diagnosed as a schwannoma, but immunohist ochemical studies showed that it was S-100 protein negative and neuron -specific enolase positive. Therefore, this tumor was identified as a stromal tumor with neural differentiation. The left adrenal tumor was a nonfunctioning adenoma.