MMP9 and nonpapillary renal cell carcinoma: It was suggested that CCL5, TYROBP, LILRB2, and MMP9 may play an essential role in the pathogenesis and development of ccRCC and may have potential clinical diagnostic and therapeutic value.[9] The survival rate of patients with low expression of TYROBP and LILRB2 genes was significantly higher than those with increased expression of LILRB2 and TYROBP genes.