DNA double strand breaks, DSBs, ETV6, Entrectinib, LMNA, Larotrectinib, NTRK, NTRK fusions, NTRK1, NTRK1 fusion oncoprotein, NTRK1 or ETV6:, NTRK1 rearrangements, NTRK3, NTRK3 fusions, TRK, cancer, cellular models, chromosomal translocations, fusion transcripts, gene fusions, hES, hES cells, hES-MP, human, human embryonic stem (hES) cells, infantile fibrosarcomas, intrachromosomal, isogenic cell lines, lipofibromatosis, mRNA, malignancy, malignant peripheral nerve sheath tumors, mesenchymal, mesenchymal neoplasms, mesenchymal progenitors, neurotrophic tyrosine receptor kinase, neurotrophic tyrosine receptor kinase (NTRK) gene fusions, soft, soft tissue tumor, tumor, tumors, tyrosine