21. He demonstrated this by removing the parathyroid glands from laboratory animals and witnessing their deaths from tetany. 22. The four parathyroid glands are situated upon the dorsal ( back ) surface of the thyroid gland. 23. Parathyroid chief cells make up the majority of the parathyroid gland along with adipocytes and oxyphil cells. 24. Though the parathyroid glands are usually located on the back of the thyroid, their position is variable. 25. However, the remaining parathyroid glands may take hours to several weeks to return to their normal functioning levels. 26. Gley realized that the cause of tetany after thyroid operations was the inadvertent destruction of the parathyroid glands . 27. See the endocrinologist, who concluded that Bill's parathyroid glands needed to come out and summoned the appropriate surgeon. 28. The patient now has two thyroid glands, both of which appear to work, as well as eight parathyroid glands . 29. In the neck are the "'thyroid "'and parathyroid glands , that secrete hormones that control metabolism and blood calcium levels. 30. Etcalcetide binds to the CaSR on the parathyroid gland , which results in receptor activation and ultimately reduction in PTH.
