SMARCB1 and kidney neoplasm: A probe specific for SMARCB1/INI1 (Empire Genomics, NY, USA) and a dual-color interphase FISH probe set for the X centromere (CEP X) and Y centromere (CEP Y) (GP Medical Technologies Inc., Beijing, China) were used to detect any abnormality of SMARCB1/INI1 and male (XY) donor or female (XX) recipient cells present in the kidney tumor specimen according to the manufacturers’ protocols.