SMARCB1 and renal cell carcinoma: The FISH analysis did not show any wild‐type signal in UOK353 and TaqMan‐based copy number analysis demonstrated loss of one copy of SMARCB1 that presumably represents a specific, focal deletion of the wild‐type SMARCB1. UOK353 mutation analysis revealed no point mutations in SMARCB1 nor any other gene known to be associated with RCC.