Undifferentiated small round cell sarcoma with t(4;19)(q35;q13.1) CIC-DUX4 fusion: a novel highly aggressive soft tissue tumor with distinctive histopathology..     ///    "Among these, a rare tumor harboring a t(4;19)(q35;q13.1) with CIC-DUX4 fusion has been described. "    ///    All 4 tumors demonstrated CIC-DUX4 fusion transcript by both RT-PCR and FISH and CIC rearrangement by FISH.     ///    "Four cases of CIC-DUX4 sarcoma, all arising in adults (3 women, 1 man, aged 20 to 43 y), were identified using conventional cytogenetic, reverse transcription polymerase chain reaction (RT-PCR) and fluorescence in situ hybridization (FISH) methods. "    ///    CIC-DUX4 sarcoma represents a novel translocation-associated sarcoma with distinctive histopathologic features and rapid disease progression. 