Evaluation of Non Specific Symptoms and Quality of Life Before and After Surgery for Mild Primary Hyperparathyroidism

Inclusion Criteria: * Subjects with known moderate HPTI will be considered for participation. Patients with sporadic mild HPTI defined by: * calcemia \> 2.6 mmol/L , PTH \> 25 ng/L and creatininemia \< 160µmol/L OR * calcemia between 2.5 and 2.6 mmol/L and PTH \> 35 ng/L * calcemia ≤2.85 mmol/L * urine calcium level / 24 hours \< 10 mmol (400 mg), * decrease of the creatinin's clearance : 30% lower than normal population with the same age * patients younger than 50 * patients who can't be followed Exclusion Criteria: * familial hypercalcemia * multiple endocrinal neoplasia * treatment with lithium or thiazides * impossibility for the patient to complete the forms * impossibility to follow the patient * patient with serious disease which impact the quality of life