For the STK15 rs2273535 polymorphic variant, the homozygous genotype containing the p.31Ile STK15 allele (c.91A) was significantly increased in the Polish sporadic RCC patients compared to controls (p = 0.044 OR 1.40, 95%CI 1.02–1.92) (See Table 1). This evidence concerns the gene AURKA and renal cell carcinoma.