Hypercalcemia of seven years' duration after kidney transplantation.

A case is reported of hypercalcemia persisting for seven years after kidney transplantation, with normocalcemia being achieved after subtotal parathyriodectomy. The finding of post-transplantation hyperparathyroidism of this extreme duration, in association with several other reports of hyperparathyroidism persisting for years after kidney transplantation, raises serious questions about the completeness of parathyroid involution after kidney transplantation. Extensive review of the literature reveals that little is really known about the natural history of parathyroid function and involution after kidney transplantation.