The biological diagnosis of the primary hyperparathyroidism is now facilitated by the reliability of the balance of phosphate and calcium and the dosage of parathyroid hormone (PTH).

This diagnosis of preoperative localization is important as surgery are now targeted to the responsible lesion.

The "gold standard" for this localization is the cervical ultrasound exploring the usual sites of adenomas and a MIBI scintigraphy (the parathyroid adenoma significantly concentrating this cell marker).

However, the diagnosis of preoperative localization remains a subject of discussion as to the most appropriate tests. Indeed, the morphological diagnosis is performed at the ultrasound stage in more than half the cases. It is the new performance of this morphological examination that makes it possible to obtain these results.

Inclusion Criteria:

• Patients with primary hyperparathyroidism with surgery indication
• Age > 18yo

Exclusion Criteria:

• surgical contraindication
• medical treatment by cinacalcet
• non sporadic hyperparathyroidism
• Age <18yo
• Protected by the law