RET and medullary thyroid gland carcinoma: The genetic screening in all relatives of newly diagnosed MTC cases is aimed to the identification of asymptomatic and apparently healthy RET carriers allowing a definitive cure by a prophylactic thyroidectomy, removing the thyroid before malignancy occurs (as usually occurs in children), or by an early thyroidectomy when MTC is still confined to the gland (as usually may occur in adults) [1,2,3].