Hypercalcemia and Familial Pheochromocytoma

In a 12-year-old boy with familial pheochromocytoma and mild hypercalcemia, the serum calcium returned to normal levels after removal of an adrenal pheochromocytoma. The production of a parathormone-like substance or some other calcium-affecting factor by the adrenal tumor is suggested. In patients with familial pheochromocytoma and hypercalcemia, priority should be given to excision of the pheochromocytoma; the serum calcium should be reevaluated postoperatively.