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Hypoparathyroidism occurs when your parathyroid glands don't secrete enough parathyroid hormone. You have four parathyroid glands — each normally about the size of a grain of rice — situated in your neck, adjacent to your thyroid gland.
The low production of PTH leads to abnormally low calcium levels (hypocalcemia) in your blood and bones and to increased levels of serum phosphorus (hyperphosphatemia).
Factors that can cause hypoparathyroidism include:
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