[Primary hyperparathyroidism: a report of 67 cases. The experience of 5 years at the IMSS Centro Médico Nacional Siglo XXI Specialties Hospital].

Introduction: Primary hyperparathyroidism (PHPT) is a frequent disease. It is characterized by hypercalcemia and elevation of parathyroid hormone (PTH) levels. The incidence is variable, being more frequent in women (3:1) in the perimenopauseal period.