CD47 and renal cell carcinoma: In our study, it was determined that 6 of the 24 chromophobe RCC patients with CD47 staining, 5 of the 7 papillary type 2 RCC carcinoma patients, all 3 clear cell RCC patients, and 14 of the 18 unclassified RCC patients died within a follow-up period of less than 5 years.