RET and medullary thyroid gland carcinoma: Around 75% MTC cases are sporadic while the remaining 25% cases are hereditary in nature and occur as part of an autosomal dominant inherited cancer syndrome called multiple endocrine neoplasia type 2 (MEN2).5, 6 MEN2 syndrome which affects multiple neuro‐endocrine organs, has three clinical subtypes: MEN2A, MEN2B and Familial MTC.7 MTC is the common clinical feature of all the three subtypes.