RT Book, Section A1 Sneider, Mark S. A1 Solorzano, Carmen C. A1 Lew, John I. A2 Morita, Shane Y. A2 Dackiw, Alan P. B. A2 Zeiger, Martha A. SR Print(0) ID 6162792 T1 Chapter 8. Primary Hyperparathyroidism T2 McGraw-Hill Manual: Endocrine Surgery YR 2010 FD 2010 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-160645-5 LK accesssurgery.mhmedical.com/content.aspx?aid=6162792 RD 2024/11/11 AB Primary hyperparathyroidism (PHPT) results from the overproduction of parathyroid hormone (PTH) by one or more autonomously hyperfunctioning parathyroid glands that usually causes hypercalcemia. PHPT is usually caused by a single parathyroid adenoma (85%); the remaining cases (15%) are caused by multigland disease (MGD) in which more than one parathyroid gland is hyperfunctional.