jump to exam page:
WOW. Amazing explanation. Great work!!
Additionally the histo looks like the Clear cell type of RCC. The large white/clear spaces with "chicken-wire" vessels and stroma between them.
Any idea as to how the " positive epithelial membrane antigen" fits into it being renal cell carcinoma?
Also to add to the reasons for it being Kidney, the image that they provide is a classic example of renal cell carcinoma cells. Take note of how the cells look to almost be vacuolated or completely clear of any cytosolic material apart from the nucleus. This the classic presentation for renal "clear cell" carcinoma.