Histopathology:
Histopathology showed tubular and cribriform proliferation of cuboidal cells as an epithelium with granular amphophilic cytoplasm with round dark blue nuclei. There was no evidence of necrosis, atypia or increased mitotic activity.
The tumor cells demonstrated positive staining for synaptophysin, and cytokeratin (AE1/AE3) also display patchy positivity for CD 56 and EMA and No sustentacular cells were identified are negative for S100. The tumor had a low proliferation index of 1%.