Primary hyperparathyroidism of the mandible. A case report.

Primary hyperparathyroidism is due to benign or malignant neoplasia of one or more parathyroid glands, causing a wide spread osteoclastic resorption of bone with fibrous tissue replacement. A case of primary hyperparathyroidism involving mandible of a 16 year old Saudi female is being reported. The patient was terated by surgical intervention. This case supports the opinion that negative laboratory tests viz., calcium and phosphorus levels do not exclude the existence of hyperparathyroidism (normocalcaemic type).