In each patient, the ETV6-NTRK3 gene fusion was identified by reverse transcriptase-polymerase chain reaction (RT-PCR) in the tumor specimens.     ///    "In each patient, the ETV6-NTRK3 gene fusion was identified by reverse transcriptase-polymerase chain reaction (RT-PCR) in the tumor specimens."    ///    Our findings suggest that the ETV6-NTRK3 gene fusion may underlie the distinctive biological properties of these tumors and may also indicate tumor chemosensitivity.     ///    Non-resectable congenital tumors with the ETV6-NTRK3 gene fusion are highly responsive to chemotherapy..     ///    " Recently, the ETV6-NTRK3 gene fusion has been identified in both infantile fibrosarcoma and cellular mesoblastic nephroma. "