Those neoplasms usually labeled for CK7, CA9, and GATA3, not expressed in TFE3-rearranged renal cell carcinomas, which are instead commonly positive for cathepsin K. Either TFE3-rearranged renal cell carcinomas or TFEB-rearranged renal cell carcinomas demonstrating papillary architecture can be confused with papillary renal cell carcinoma. The gene discussed is GATA3; the disease is renal cell carcinoma.