TFE3 and renal cell carcinoma: In order to reveal the role of TFE3 IHC in the diagnosis of TFE3‐rearranged RCC, we have collected the clinical information and pathological specimens of RCC under the age of 30 in the First Affiliated Hospital of Sun Yat‐sen University and the Cancer Center of Sun Yat‐sen University from 2010 to 2021 to further explore the accuracy and sensitivity of IHC as a preliminary screening for TFE3‐rearranged RCC.