Background In the United States, most patients with primaryhyperparathyroidism have few or no symptoms. The need for parathyroidectomyto treat all patients with this disorder has therefore beenquestioned.
Methods We studied the clinical course and development of complicationsfor periods of up to 10 years in 121 patients with primary hyperparathyroidism,101 (83 percent) of whom were asymptomatic. There were 30 menand 91 women (age range, 20 to 79 years). During the study,61 patients (50 percent) underwent parathyroidectomy, and 60patients were followed without surgery.
Results Parathyroidectomy in patients with or without symptomsled to normalization of serum calcium concentrations and a mean(±SE) increase in lumbar-spine bone mineral density of8±2 percent after 1 year (P=0.005) and 12±3 percentafter 10 years (P=0.03). Bone mineral density of the femoralneck increased 6±1 percent after 1 year (P=0.002) and14±4 percent after 10 years (P=0.002). Bone mineral densityof the radius did not change significantly. The 52 asymptomaticpatients who did not undergo surgery had no change in serumcalcium concentration, urinary calcium excretion, or bone mineraldensity. However, 14 of these 52 patients (27 percent) had progressionof disease, defined as the development of at least one new indicationfor parathyroidectomy. All 20 patients with symptoms had kidneystones. None of the 12 who underwent parathyroidectomy had recurrentkidney stones, whereas 6 of the 8 patients who did not undergosurgery did have a recurrence.
Conclusions In patients with primary hyperparathyroidism, parathyroidectomyresults in the normalization of biochemical values and increasedbone mineral density. Most asymptomatic patients who did notundergo surgery did not have progression of disease, but approximatelyone quarter of them did have some progression.
Source Information
From the Departments of Medicine (S.J.S., E. Shane, T.P.J., E. Siris, J.P.B.) and Pharmacology (J.P.B.), College of Physicians and Surgeons, Columbia University, New York.
Address reprint requests to Dr. Silverberg at the Department of Medicine, College of Physicians and Surgeons, 630 W. 168th St., New York, NY 10032.
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