Abstract
A 13 years old male complained of headache and convulsive seizures and short spells of loss of consciousness for last 2 months. Typical clinical features for pseudohypoparathyroidism such as short stature, round face, subcutaneous calcification, and lack of phosphaturic response to parathyroid extract, hypocalcemia and hyperphosphatemia, were noted. Benzoic acid extract of the urine revealed an increased parathyroid hormone-like calcium-mobilizing activity, which decreased after treatment with AT-10, and a normal phosphaturic activity. Parathyroid hyperfunction due to the target organ failure may be suggested although no other evidence of secondary hyperparathyroidism was demonstrated.
