[Primary hyperparathyroidism: etiology, diagnosis and treatment].

Primary hyperparathyroidism is a not so infrequent disease that is often overlooked by physicians. Its incidence is estimated to be about 28 in 100.000 subjects, mainly women over seventy years old. Three to four percents of women over seventy are affected. Hyperparathyroidism can be isolated or be a component of a more complex syndrome like multiple endocrine neoplasms (MEN). Patients can be asymptomatic or present with symptoms like asthenia, hypertension or nephrolithiasis. The biological investigation requires the combined measurements of plasmatic ionized calcium and parathormone. In some cases, more specific explorations like calcium loading tests have to be performed in order to confirm the diagnosis.