GFAP and neoplasm: Immunohistochemistry studies revealed that, the tumor cells were D2–40 (+), carbonic anhydrase (CAIX) (+ ), neuron-specific enolase (NSE) (±), Inhibin- α (+),brahma related gene-1 (BRG1) (+), Ki67 (+, 20%–30%), glial fibrillary acidic proteins (GFAP) (−), S-100 (−), CK (−), epithelial membrane antigen (−), P63 (−), CD34 (−), signal transducer and activator of transcription 6 (−), desmin (−), smooth muscle actin (−), thyroid transcription factor 1 (−), chromogranin A (−), synaptophysin (−).