PMC6702843_01
Abdominopelvic CT with IV contrast demonstrates a 14 cm enhancing mass in the right kidney. (a) Axial image shows there was significant enhancement of the solid components of the tumor with finger-like extensions of absent enhancement consistent with necrosis or inflammation. (b) Coronal image demonstrates the enlarged liver that filled all four abdominal quadrants. (c) In sagittal view, the liver is seen to be anteriorly displaced by the large renal mass and to extend down to the right iliac crest.
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There was significant enhancement of the solid components of the tumor and finger-like extensions of absent enhancement throughout the renal mass consistent with areas of necrosis or acute inflammation (Figure 1(a)). The mass arose from the mid and upper pole of the right kidney and extended superiorly displacing the right lobe of the liver and inferior vena cava (IVC) anteriorly, making the liver palpable (Figure 1(b)). The liver, in fact, extended down to her right iliac crest and below her umbilicus on both sides of her abdomen (Figure 1(c)).
Histological findings of oncocytoma with large eosinophilic cells arranged in distinct nests.
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According to final pathologic analysis, including a panel of immunochemical stains which excluded RCC and metanephric adenoma, the diagnosis was renal oncocytoma (Figure 2).