Decreased Parathyroid Hormone Anatomy
To better understand hypoparathyroidism, it helps to understand the anatomy of the parathyroid glands.
The four parathyroid glands are located in the neck, embedded inside of the thyroid gland. The parathyroid glands produce parathyroid hormone.
- Garfield N, Karaplis AC. Genetics and animal models of hypoparathyroidism. Trends Endocrinol Metab. 2001 Sep;12(7):288-94. 
- Winer KK, Ko CW, Reynolds JC, Dowdy K, Keil M, Peterson D, Gerber LH, McGarvey C, Cutler GB Jr. Long-term treatment of hypoparathyroidism: a randomized controlled study comparing parathyroid hormone-(1-34) versus calcitriol and calcium. J Clin Endocrinol Metab. 2003 Sep;88(9):4214-20. 
- Winer KK, Yanovski JA, Sarani B, Cutler GB Jr. A randomized, cross-over trial of once-daily versus twice-daily parathyroid hormone 1-34 in treatment of hypoparathyroidism. J Clin Endocrinol Metab. 1998 Oct;83(10):3480-6.