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Case report: hypoparathyroidism with menses-associated hypocalcemia
1Medical Service, Veterans Administration Medical Center, Baylor College of Medicine, Houston, Texas 77030.
The American Journal of the Medical Sciences
|July 1, 1992
Summary
Idiopathic hypoparathyroidism can cause symptomatic calcium drops during menses. Serum calcium levels during menstruation may not reliably guide hypoparathyroidism medication adjustments.
Area of Science:
- Endocrinology
- Mineral Metabolism
Background:
- Idiopathic hypoparathyroidism is a rare endocrine disorder characterized by insufficient parathyroid hormone production.
- Hormonal fluctuations, such as those during the menstrual cycle, can impact mineral metabolism in patients with hypoparathyroidism.
Observation:
- A patient with idiopathic hypoparathyroidism experienced recurrent tetany associated with her menstrual cycle.
- Serum calcium levels significantly decreased following oral contraceptive withdrawal and during spontaneous menses in this patient.
Findings:
- The observed decline in serum calcium was not explained by changes in urinary calcium, serum magnesium, or calcitriol levels.
- In contrast, hypoparathyroid women without menstrual-related symptoms maintained stable serum calcium after estrogen withdrawal, with some showing increased calcitriol.
Implications:
- Menstrual-associated hypocalcemia can occur in some women with idiopathic hypoparathyroidism, necessitating careful monitoring.
- Serum calcium measurements during menses may be unreliable for adjusting medication dosages in hypoparathyroidism.
- Further research is needed to elucidate the mechanism of estrogen's effect on calcium and calcitriol in the absence of parathyroid function.