Molecular profiling in primary hyperparathyroidism.

Primary hyperparathyroidism (HPT) is one of the most common endocrine disorders, defined by hypersecretion of parathormone. Primary HPT can be caused by adenoma, hyperplasia, and carcinoma. A great amount of mechanisms contribute to the pathogenesis of this disease, such as genetic predispositions because of the germline-inactivating mutations in the multiple endocrine neoplasia type 1 (MEN1) and HRPT2 tumor suppressor genes. Somatic mutations in these genes were found also in sporadic parathyroid neoplasias. Cell cycle regulators, growth factors, apoptosis-inducing ligands, death receptors, and other transmitter substances have also been implicated in the etiology of primary HPT. Parathyroid carcinoma is often misdiagnosed as parathyroid adenoma and long-term survival is conditioned by the extent of the primary surgical resection, therefore, of great interest is the discovery of definitive diagnostic markers for carcinoma. This article presents current state of knowledge of the molecular pathogenesis of primary HPT.