RT Journal Article T1 MEN1-associated primary hyperparathyroidism in the Spanish Registry: clinical characterictics and surgical outcomes. A1 Lamas, Cristina A1 Navarro, Elena A1 Casterás, Anna A1 Portillo, Paloma A1 Alcázar, Victoria A1 Calatayud, María A1 Álvarez-Escolá, Cristina A1 Sastre, Julia A1 Boix, Evangelina A1 Forga, Lluis A1 Vicente, Almudena A1 Oriola, Josep A1 Mesa, Jordi A1 Valdés, Nuria K1 MEN1 gene K1 hypoparathyroidism K1 multiple endocrine neoplasia type 1 K1 parathyroidectomy K1 primary hyperparathyroidism AB Primary hyperparathyroidism is the most frequent manifestation of multiple endocrine neoplasia type 1 (MEN1) syndrome. Bone and renal complications are common. Surgery is the treatment of choice, but the best timing for surgery is controversial and predictors of persistence and recurrence are not well known. Our study describes the clinical characteristics and the surgical outcomes, after surgery and in the long term, of the patients with MEN1 and primary hyperparathyroidism included in the Spanish Registry of Multiple Endocrine Neoplasia, Pheochromocytomas and Paragangliomas (REGMEN). Eighty-nine patients (49 men and 40 women, 34.2 ± 13 years old) were included. Sixty-four out of the 89 underwent surgery: a total parathyroidectomy was done in 13 patients, a subtotal parathyroidectomy in 34 and a less than subtotal parathyroidectomy in 15. Remission rates were higher after a total or a subtotal parathyroidectomy than after a less than subtotal (3/4 and 20/22 vs 7/12, P SN 2049-3614 YR 2019 FD 2019 LK https://hdl.handle.net/10668/27427 UL https://hdl.handle.net/10668/27427 LA en DS RISalud RD Apr 6, 2025