A YAP1-TFE3 fusion was thus detected, which was further validated by FISH and reverse transcription polymerase chain reaction (RT-PCR).     ///    "In summary, we are reporting a novel subset of EHE occurring in young adults, showing a distinct phenotype and YAP1-TFE3 fusions.. "    ///    Novel YAP1-TFE3 fusion defines a distinct subset of epithelioid hemangioendothelioma.. 