Notably, another association between endocrine pancreas anomalies and parathyroid disorders, but in the sense of hypoparathyroidism (low serum PTH and calcium), involves a common autoimmune background of the poly-glandular autoimmune syndrome, also involving type 1 diabetes mellitus (due to endocrine pancreas anomalies), chronic autoimmune Hashimoto’s thyroiditis, premature ovarian failure (hypergonadotropic hypogonadism), and Addison’s disease in different combinations affecting both children and adults [180,181,182]. This evidence concerns the gene PTH and type 1 diabetes mellitus.