11. Lithium-associated hyperparathyroidism is usually caused by a single parathyroid adenoma. 12. He did pioneering work with the hormone Parathyroid hormone ( PTH ). 13. Primary hyperparathyroidism is most commonly due to solitary parathyroid adenoma. 14. Calcimimetics reduce the amount of parathyroid hormone released by the parathyroid glands. 15. Calcimimetics reduce the amount of parathyroid hormone released by the parathyroid glands. 16. The parathyroid chief cell is the primary cell of the parathyroid gland. 17. The parathyroid chief cell is the primary cell of the parathyroid gland. 18. It produces and secretes parathyroid hormone in response to low calcium levels. 19. Parathyroid chief cells have large amounts of organelles associated with protein synthesis.20. Parathyroidectomy, or the removal of the parathyroids , requires general anesthesia.