TFE3 and renal cell carcinoma associated with Xp11.2 translocations/TFE3 gene fusions: To assess whether ASPL-TFE3 RCC, one of the subtypes of Xp11.2 tRCC with a fusion pattern of t(x;17)(p11.2;q25), showed more aggressive progress than other subtypes, we used an ASPL-TFE3 dual-fusion FISH probe for the diagnosis of ASPL-TFE3 RCC.