Validation of a Hypoparathyroidism Self-questionnaire

Inclusion Criteria: * Major patient * Patients undergoing total thyroidectomy * Patients with permanent hypoparathyroidism defined by a parathyroid hormone concentration ≤ 25 pg/mL more than 6 months after surgery and who require vitamin and calcium therapy. * Not being opposed to participating in the study (questionnaires will be sent with the study information note. If the patient returns the questionnaires: we will consider that he/she is not opposed to participate in this study) * Participants must be affiliated to a social security system Exclusion Criteria: * Pregnant women when filling out questionnaires (the child's parathyroids can correct the mother's hypoparathyroidism) * Minors or protected patients (under guardianship) * Patients under court protection * Patients on long-term vitamin-calcium therapy after total thyroidectomy whose PTH concentration has not been controlled or whose concentration is higher than 25 pg/mL. * Hypoparathyroid patients of other origin than post-thyroidectomy