The main role of parathyroid glands is regulation of calcium serum concentration by producing and secreting a peptide hormone named parathormone. Parathormone increases serum calcium level through the effects on bones, kidneys and intestines. Most common manifestation of parathyroid glands disorders is abnormal calcium level. Excessive secretion of parathormone causes hyperparathyroidism. We can distinguish between primary, secondary and tertiary hyperparathyroidism. … Preberite več >>