CD274 and nonpapillary renal cell carcinoma: Related to this, co‐expression of PD‐1 and PD‐L1 has been evaluated across a range of solid tumors, with a reported prevalence of 33% in primary kidney tumors.14 We observed similar prevalence of co‐expression of PD‐1 and PD‐L1 in primary ccRCC tumors: 24% expressed both PD‐1 and PD‐L1, and 9% did not express either PD‐1 or PD‐L1.