NTRK1 and primitive neuroectodermal tumor: The NTRK gene and fusion partner was TPM3::NTRK1 (fibrosarcoma), LPPR1::NTRK2 (Ewing’s sarcoma), DAB2IP::NTRK2 (primitive neuroectodermal tumor), and RAD51B::NTRK3 (PTC).