Causes
The following are causes of hypocalcaemia:
Low PTH
- Hypoparathyroidism
- Hypomagnesaemia
- Hungry bone syndrome
High PTH
- Vitamin D Deficiency: Dietary malabsorption or lack UVL
- Renal failure: 1,25 OH D3 synthesis impaired renal osteodystrophy; retention PO42-
Other
- Anticonvulsants
- Massive transfusion
- Acute rhabdomyolysis
- Acute pancreatitis
- Pseudohypoparathyroidism: End organ resistance to PTH
- Pseudo-Pseudohypoparathyroidism: Phenotypic above but normal Ca2+ metabolism.
- Osteomalacia
- Rickets
- Parathyroid removal
- Di George syndrome
- Malabsorption e.g. coeliac disease