RET and thyroid gland carcinoma: Thyroid cancer represents a type of neoplasia in which critical genes are often mutated through two different molecular mechanisms: point mutation (BRAF, RAS, TP53, and CTNNB1) and chromosomal rearrangement (fusion of the RET gene to several unrelated genes known as RET/PTC rearrangement, RET/PTC) [55,56].