The diagnosis of primary hyperparathyroidism.

Certain clinical features arouse suspicion of primary hyperparathyrodism, but a firm diagnosis depends upon laboratory tests. Hypercalcaemia associated with a raised or detectable level of parathyroid hormone (PTH) in the serum is diagnostic. Facilities for obtaining PTH estimations are available everwhere in the United Kingdom through the Supraregional Assay Service.