Primary hyperparathyroidism is a state of excess secretion ofparathyroid hormone and hypercalcemia, often with skeletal andrenal complications. The disease usually results from a singleparathyroid adenoma. Less commonly, tumors occur in multipleparathyroid glands, and in these cases the disease may be familial.Familial primary hyperparathyroidism may occur in several geneticallydistinct disorders, including multiple endocrine neoplasia types1 and 2A, the hyperparathyroidismjaw tumor (HPT-JT) syndrome,and familial hypocalciuric hypercalcemia, or it can presentas a solitary abnormality (as in familial isolated hyperparathyroidism).
(See Glossary.)
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Primary hyperparathyroidism occurs in virtually all patientswith multiple endocrine neoplasia type . . . [Full Text of this Article]
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From the Metabolic Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Md.
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