A 14-year-old girl, hospitalized twice because of kidney stones with no other clinical symptoms of hyperparathyroidism, was operated on; a parathyroid adenoma was found and removed. Significantly elevated values of ultrafiltrable calcium in plasma supported the diagnosis of hyperparathyroidism.
Bergman L, Hagberg S. Primary Hyperparathyroidism in a Child Investigated by Determination of Ultrafiltrable Calcium. Am J Dis Child. 1972;123(2):174–176. doi:10.1001/archpedi.1972.02110080152024
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