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Article |

Pamidronate for Cancer-Associated Hypercalcemia

Ajay Anand, MD; Namrata Anand, MD
Arch Intern Med. 1995;155(6):641-642. doi:10.1001/archinte.1995.00430060105015.
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The article by Gucalp and colleagues,1 comparing rapid and slow intravenous infusion regimens of pamidronate in the treatment of malignancy-associated hypercalcemia, was interesting and informative. In this context, I would like to draw the authors' attention to some further data concerning this subject.

The authors took into account several laboratory parameters in the randomized groups of patients receiving either a 4- or 24-hour infusion of 60 mg of pamidronate. Two other parameters have, however, also been shown to affect the response of tumor-induced hypercalcemia to pamidronate. Gurney and associates2 showed that the concentration of parathyroid hormone-related protein is an important predictor of this response. An undetectable level of parathyroid hormone-related protein (<2 pmol/L) was associated with normalization of the serum calcium concentration in seven of seven patients, and the levels of 2 to 12 pmol/L were associated with a similar response in 10 of 14 patients, while the


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