“…It has been noticed, however, that the concurrence of RTA and autoimmune thyroid disease is extremely rare [2,4,5,10,17], Therefore, it has been generally thought that in the latter association, the nature of the link between hyper thyroidism and RTA could be metabolic, via hypercal cemia, hypercalciuria, and nephrocalcinosis, rather than immunological [2,4,5].…”