MEN1 and hyperparathyroidism: This was demonstrated in a review of 18 reports that included 2–73 patients with MEN1 followed for 4–12 years after subtotal parathyroidectomy with or without cervical thymectomy, where persistent hyperparathyroidism was noted in 0–33%, recurrent hyperparathyroidism in 0–36%, and persistent hypoparathyroidism in 0–35% of patients.