Quotes & Sayings About Parathyroid
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Primary hyperparathyroidism Primary hyperparathyroidism is caused by autonomous secretion of PTH, usually by a single parathyroid adenoma which can vary in diameter from a few millimetres to several centimetres. It should be distinguished from secondary hyperparathyroidism, in which there is a physiological increase in PTH secretion to compensate for prolonged hypocalcaemia (such as in vitamin D deficiency, p. 1121), and tertiary hyperparathyroidism, in which continuous stimulation of the parathyroids over a prolonged period of time results in adenoma formation and autonomous PTH secretion (Box 20.37). This is most commonly seen in individuals with advanced chronic kidney disease (p. 487). — Nicki R. Colledge