Although these other cancer-related genes (such as TP53, tyrosine kinase receptors, DNA damage response effectors, etc.)are well characterized in other tumor types, including follicular-cell-derived thyroid cancers [42,43,44], in the MTC context, their identification represents a recent finding, and their role remains to be further investigated and defined. Here, NTRK1 is linked to medullary thyroid gland carcinoma.