Fig. 2

shows a tumor infiltrating the renal parenchyma (A). The tumor shows a nodular pattern of arrangement with surrounding dense fibrous tissue along with entrapment of adjacent renal tubules and glomeruli (right top corner) (B). On high power, the tumor shows a papillary pattern of arrangement with fibro-vascular cores. The tumor cells are small, uniform in size with round nuclei, inconspicuous nucleoli, scant cytoplasm and indistinct cytoplasmic membranes (C, D)