Coincidence of Multiple Endocrine Neoplasia Types 1 and 2: Mutations in theRETProtooncogene andMEN1Tumor Suppressor Gene in a Family Presenting with Recurrent Primary Hyperparathyroidism

Primary hyperparathyroidism (HPT) presents as a part of inherited syndromes such as multiple endocrine neoplasia (MEN) types 1 and 2. In patients with MEN1, parathyroid hyperplasia or multiple adenomas occur in approximately 90-95%. MEN2A-related HPT is characterized by a mild hypercalcemia, which is mostly asymptomatic.Here we present a family with coexistence of MEN1 gene mutation and RET mutation.Six family members carrying MEN1 gene mutation...