NTRK1 and colorectal carcinoma: Tumor cells derived from one of the two TrkA IHC+ CRC patients were sensitive to a potent pan-TrkA inhibitor, entrectinib, with inhibition of downstream pathways, suggesting that NTRK1 rearrangements in non-lung or non-thyroid cancer can be a potent actionable genetic aberration as in NSCLC [18].