Worth mentioning is the fact that the TDSI patient group had more cases of patients with Graves’ disease, only one patient experienced postsurgical hypocalcaemia with PTH levels after a month >10 pg/ml, unlike the other group of patients with three cases of Graves’ disease, in which all three experienced postsurgical hypocalcaemia and transient hypoparathyroidism. This evidence concerns the gene PTH and Graves disease.