TAILIEUCHUNG - Chapter 047. Hypercalcemia and Hypocalcemia (Part 4)

Table 47-2 Causes of Hypocalcemia Low Parathyroid Hormone Levels (Hypoparathyroidism) Parathyroid agenesis Isolated DiGeorge syndrome Parathyroid destruction Surgical Radiation Infiltration by metastases or systemic diseases Autoimmune Reduced parathyroid function Hypomagnesemia Activating CaSR mutations High Parathyroid Hormone Levels (Secondary Hyperparathyroidism) Vitamin D deficiency or impaired 1,25(OH)2D production/action Nutritional vitamin D deficiency (poor intake or absorption) Renal insufficiency with impaired 1,25(OH)2D production Vitamin D resistance, including receptor defects Parathyroid hormone resistance syndromes PTH receptor mutations Pseudohypoparathyroidism (G protein mutations) Drugs Calcium chelators Inhibitors of bone resorption (bisphosphonates, plicamycin) Altered vitamin D metabolism (phenytoin, ketoconazole) Miscellaneous causes Acute pancreatitis Acute rhabdomyolysis . | Chapter 047. Hypercalcemia and Hypocalcemia Part 4 Table 47-2 Causes of Hypocalcemia Low Parathyroid Hormone Levels Hypoparathyroidism Parathyroid agenesis Isolated DiGeorge syndrome Parathyroid destruction Surgical Radiation Infiltration by metastases or systemic diseases Autoimmune Reduced parathyroid function Hypomagnesemia Activating CaSR mutations High Parathyroid Hormone Levels Secondary Hyperparathyroidism Vitamin D deficiency or impaired 1 25 OH 2D production action Nutritional vitamin D deficiency poor intake or absorption Renal insufficiency with impaired 1 25 OH 2D production Vitamin D resistance including receptor defects Parathyroid hormone resistance syndromes PTH receptor mutations Pseudohypoparathyroidism G protein mutations Drugs Calcium .

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