HMGA2 and nonpapillary renal cell carcinoma: In line with our data, the TCGA dataset identified only a small set of HMGA2 positive cancers with a markedly adverse prognosis in ccRCC (Supplementary Fig. 2a) while the group of positive cancers was much larger in papillary RCC, where the prognostic impact was less stringent (Supplementary Fig. 2b).