STC1 expression levels were elevated to a greater extent in ccRCC tissues and associated with distant metastasis, but only T1 stage tumours exhibited a statistically significant difference (P = .021) in STC1 expression compared with other tumour stages, suggesting that STC1 is associated with metastasis of early stage ccRCC.93 Here, STC1 is linked to nonpapillary renal cell carcinoma.