A total of 656 primary renal tumors—that is, 542 clear cell, 43 papillary, 29 chromophobe, seven collecting-duct, 15 unclassified, or other rare subtype RCCs, 14 oncocytomas, and 6 AMLs—as well as 34 normal kidney tissue samples were analyzed for PTHLH mRNA expression. Here, PTHLH is linked to oncocytic adenoma.