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CASE REPORTS |
Department of Reproductive Medicine, University of California at San Diego, San Diego, California
Address reprint requests to: Michael Dahan, MD, Department of Reproductive Medicine (0633), University of California at San Diego, 9500 Gilman Drive, San Diego, CA 92093; E-mail: mhdahan{at}ucsd.edu.
BACKGROUND: It has been suggested that magnesium can be used to reduce serum calcium levels seen with hyperparathyroidism during pregnancy, thus reducing maternal and fetal risk.
CASE: A young woman presented at 32 weeks gestation with abdominal pain from pancreatitis caused by hyperparathyroidism from a parathyroid adenoma. She was started on magnesium sulfate tocolysis for preterm labor. During treatment, serum parathyroid hormone was undetectable, but serum calcium and vitamin D-1,25 were elevated. When magnesium was discontinued, her vitamin D-1,25 was suppressed and the parathyroid hormone was elevated.
CONCLUSION: For some patients, because of persistent hypercalcemia, magnesium sulfate might not be a viable treatment option for hyperparathyroidism during pregnancy.
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