PMC5769258_01
(a) Gross cut section - well-circumscribed solid tumor, mahogany brown, with a central scar, involving upper and mid pole of kidney. (b) Contrast-enhanced computed tomography scan image of the abdomen showing heterogeneously enhancing upper pole mass with enhancing enlarged lymph nodes in left hilar, para-aortic, and interaortocaval regions
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F1
Contrast-enhanced computed tomography (CECT) of the thorax and abdomen done a year ago showed bilateral pulmonary cysts with a right small pneumothorax, a 6.9 cm heterogeneously enhancing mass in the left kidney, with a nonenhancing central scar, along with multiple enhancing lymph nodes in the left hilar, para-aortic, interaortocaval, and precaval regions, largest measuring 4 cm [Figure 1]. A laparoscopic left radical nephrectomy was performed along with lymphadenectomy of the hilar and para-aortic lymph nodes [Figure 1].
(a) Tumor cells having polygonal cell with clear or densely eosinophilic cytoplasm, large hyperchromatic nucleus (arrow). (b) Triphasic tumor comprising of mature adipose tissue (thick arrow) ill-formed thick-walled blood vessels (thin arrow) and smooth muscles (thinnest arrow)
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F2
The histopathology of the renal mass showed round to polygonal cells arranged in nests and trabeculae, with abundant amount of granular eosinophilic cytoplasm and centrally placed hyperchromatic nuclei [Figure 2a]. Few dilated vesicular channels lined by a single layer of endothelial cells were also present [Figure 2b].