Transient neonatal hyperparathyroidism secondary to maternal pseudohypoparathyroidism

A neonate was found to have normocalcaemic hyperparathyroidism with bone disease. The plasma parathyroid hormone concentration returned to normal by 4 weeks, and healing of the bone lesions was evident by age 5 months. The mother proved to have pseudohypoparathyroidism, previously unsuspected.