Histopathology:
- 19x17x11cm mass, upper and lower pole and mid region; adherent
to capsule; with necrosis. Lymph nodes free of tumor.
- Positive markers: CK, Vimentin, TLE-1, CD99, EMA, Cytokeratin
AE1/AE3 and Cytokeratin 20.
- Renal cell carcinoma, sarcomatoid variant