Delusional depression, hyperparathyroidism, and ECT.

A woman with delusional depression and unsuspected primary hyperparathyroid disorders responded completely to electroconvulsive therapy (ECT). Hypercalcemia is a complicating factor in the treatment of delusional depression, but there is little evidence that it is causative and the use of ECT should not be delayed. The case adds to the literature confirming the efficacy and safety of ECT with physically ill patients when it may be a life-saving procedure.