Unexplained Hypercalcemia in Maintenance Hemodialysis: Control by Small Dosages of Prednisolone

Michel J. Fuss, MD; Pierre J. Bergmann, MD; Josée Verbanck-Taverne, MD; Dirk L. Verbeelen, MD; Jean-Louis Vanherweghem, MD
Arch Intern Med. 1982;142(5):1041-1042. doi:10.1001/archinte.1982.00340180199035.
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To the Editor.  —Johnson1 described three patients undergoing regular hemodialysis (RHD) who experienced unexplained hypercalcemia; serum calcium levels remained unchanged after parathyroidectomy. We observed two similar patients whose hypercalcemia was controlled with small doses of prednisolone.Regular hemodialysis treatment was given three times a week with 7.5 mg/dL of dialysate calcium. The following measurements were performed: radioimmunoassay (RIA) of aminoterminal immunoreactive parathyroid hormone2 (iPTH) (normal, up to 15 μLEq of parathyroid extract per milliliter), radiochemical assay of 25-hydroxyvitamin D3 (25-[OH]D3) (normal, 12 to 30 ng/mL), RIA of 1,25-dihydroxyvitamin D3 (1,25-[OH]2D3) (normal, 20 to 65 pg/mL), RIA of cortisol (normal, 10 to 22 μg/dL), and whole-body retention (WBR) of ingested 47Ca (normal, 25% to 40%).3 An iliac crest biopsy was done with a 3-mm diameter trephine.

Report of Cases.—Case 1.  —As seen in the Figure, a 25-year-old woman with


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