It is a matter of considerable interest to students of parathyroid tetany that men are very seldom affected by the disease. In a series of 176 cases of post-thyroidectomy tetany that we have seen, only nine occurred in men and of these in only one instance was the tetany at all severe. This is even more remarkable when one reflects that thyroidectomy is performed only four times more frequently in women than in men. In a series of 88 cases of tetany, Boothby, Haines and Pemberton (1) found only one case in a man.