Neurotrophic tyrosine kinase receptor (NTRK) is a family of 3 proto-oncogenes including NTRK1, NTRK2, and NTRK3 which encode Trk A, Trk B, and Trk C proteins, respectively [PMID: 28719467]. Pan-TRK antibodies have been used to detect gene fusions in diverse types of tumors [PMID: 37017998].