NTRK1 and spindle cell sarcoma: [66] revealed that a majority (7/13) of spindle cell sarcomas resembling fibrosarcoma in the uterus/vagina harbored NTRK rearrangements, primarily TPM3‐NTRK1 (6 cases), and crucially, all NTRK‐rearranged tumors exhibited diffuse Pan‐Trk immunohistochemical staining, highlighting a valuable diagnostic marker and defining a novel molecularly distinct entity.