case_images: PMC6402212_01
case_images: Computed tomography without contrast revealed a large right renal mass with significant mass effect on the right kidney. Adjacent soft tissue nodularities were concerning for satellite nodules or metastatic disease.
case_images: CRIU2019-2561289.001.jpg
case_images: PMC6402212_01_CRIU2019-2561289.001.jpg
case_images: fig1
case_images: Computed Tomography (CT) revealed a 14 x 13 x 16 cm right renal mass almost completely replacing the interpolar region, with significant mass effect on the right kidney (Figures 1 and 2). Adjacent tissue nodularity in the perinephric fat was concerning for satellite nodules or metastatic disease (Figure 1).
case_images: Computed tomography without contrast demonstrating a large heterogeneous right renal mass.
case_images: CRIU2019-2561289.002.jpg
case_images: PMC6402212_01_CRIU2019-2561289.002.jpg
case_images: fig2
case_images: Computed Tomography (CT) revealed a 14 x 13 x 16 cm right renal mass almost completely replacing the interpolar region, with significant mass effect on the right kidney (Figures 1 and 2).
case_images: Computed tomography without contrast demonstrating left paraaortic mass, left interpolar renal mass, and large right renal mass.
case_images: CRIU2019-2561289.003.jpg
case_images: PMC6402212_01_CRIU2019-2561289.003.jpg
case_images: fig3
case_images: The left kidney was notable for multiple solid renal masses measuring 6.3 cm at the upper pole and 4.6 cm at the interpolar region (Figure 3). A left paraaortic soft tissue mass measuring 4.6 x 4.6 cm with associated calcification was concerning for adenopathy (Figure 3).
case_images: Gross specimen of right kidney containing maroon-colored mass with gray-white central scar.
case_images: CRIU2019-2561289.004.jpg
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case_images: fig4
case_images: Grossly, the right kidney contained a spherical, encapsulated, and homogenous maroon-colored mass with a gray-white lobulated central scar (Figure 4).
case_images: Microscopic (100x) H & E stained tumor revealing nests of round and polygonal cells with granular, eosinophilic cytoplasm classic for oncocytoma.
case_images: CRIU2019-2561289.005.jpg
case_images: PMC6402212_01_CRIU2019-2561289.005.jpg
case_images: fig5
case_images: Histologic examination revealed nests of round and polygonal cells with granular, eosinophilic cytoplasm (Figure 5) consistent with oncocytoma.
case_images: Microscopic (40x) renal tumor cells demonstrated positive staining for CK7.
case_images: CRIU2019-2561289.006.jpg
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case_images: fig6
case_images: The tumor cells were positive for CD117, CK7 (Figure 6), and weakly positive for CD10.
case_images: Cross sections of retroperitoneal ancient schwannoma with glistening tan-white surface.
case_images: CRIU2019-2561289.007.jpg
case_images: PMC6402212_01_CRIU2019-2561289.007.jpg
case_images: fig7
case_images: Cross sections of the left paraaortic mass revealed a smooth, encapsulated mass with a pearly and glistening tan-white surface (Figure 7).