To the editor: Tony Christensson's report (Ann Intern Med 89:216–217, 1978) on the possible relation between hyperparathyroidism and previous neck irradiation is timely. It is becoming increasingly apparent that parathyroid abnormalities, as well as thyroid carcinoma, can be a sequel to such irradiation. They may occur simultaneously, as illustrated by a case we recently encountered.
A 53-year-old housewife was found on routine examination to have a mass about 0.2 cm. in diameter on the anterior right side of her neck. A 1-cm mass was also felt in the left lobe of the thyroid. Both moved upward with swallowing and were