Clinical Research Directory

Inclusion Criteria: 1. Patients with PHPT * Adult patients * Patients with PHPT, whether operated on or not, defined by a calcium level \> 2.60 mmol/L with inappropriate PTH (\> 15 pg/mL) or normal calcium with elevated PTH (\> 65 pg/mL) before surgery. * Consulting for PHPT surgery, or at 6, 12, or 36 months post-surgery. * Not opposed to participating in the study (questionnaires will be provided/sent with the study information sheet. If the patient returns the questionnaires, it will be considered that they are not opposed to participating in the study). 2. Control Patients * Adult patients * Patients consulting for thyroid surgery for benign thyroid nodules with normal thyroid function (serum TSH between 0.4 and 4.0 mIU/L) and no hypercalcemia (calcium ≤ 2.6 mmol/L). * Not opposed to participating in the study (questionnaires will be provided/sent with the study information sheet. If the patient returns the questionnaires, it will be considered that they are not opposed to participating in the study). Exclusion Criteria: * Pregnant women at the time of completing the questionnaires (the child's parathyroid glands can influence the mother's parathyroid status). * Minors or protected patients (under guardianship/curatorship). * Patients with secondary/tertiary hyperparathyroidism (defined by hypocalcemia \< 2.0 mmol/L with elevated PTH, or hypercalcemia with elevated PTH with a history of kidney transplantation, respectively).