NTRK1 and spindle cell neoplasm: An extensive literature search was performed to identify previously reported cases of NTRK-RSCNS in PubMed (http://www.ncbi.nlm.nih.gov/pubmed/) using different combinations of keywords in the title/abstract field, including “NTRK-rearranged spindle cell neoplasm”, “NTRK-rearranged neoplasm”, “NTRK fusion”, “pan-TRK immunohistochemistry”, “NTRK1”, “NTRK2”, “NTRK3” until July 2024.