Among the three NTRK genes, NTRK1 and NTRK3 gene fusions can be identified in a wide range of cancer types, NTRK3 fusion is the most common followed by NTRK1 fusion, and ETV6-NTRK3 along with TPM3-NTRK1 are the most common fusion partners (7, 29, 31, 32). The gene discussed is NTRK1; the disease is cancer.