Fig. 3

Histopathological findings of the left kidney tumor. Large-sized tumor cells with atypical small nucleus and clear cytoplasm made trabecular nests with intervening thin-walled vascular network with hematoxylin and eosin (HE) stain. These tumor cells were negative for synaptophysin stain and chromogranin A stain, but positive for CD10. We diagnosed this tumor as clear cell RCC