There was a significant difference in peak enhancement between Xp11.2/TFE3 RCC and ccRCC (P < 0.05) and between Xp11.2/TFE3 RCC and pRCC (P < 0.05) (Figs. 2, 3, 4). The gene discussed is PRCC; the disease is nonpapillary renal cell carcinoma.