ALDH1A1 and renal cell carcinoma: Numerous studies have since tried to isolate CSCs from RCC 10, 11, 12, 13, 14, with CD105, ALDH1, OCT4, CD133, and CXCR4 reported as markers of cancer stem‐like cells from RCC 5, 11, 15, 16, 17, 18, 19.