[Mechanism of intracerebral calcification in hypoparathyroidism].

The mechanism of intracranial calcification in hypoparathyroidism, more frequently seen in pseudo--than idiopathic hypoparathyroidism, has not been completely elucidated, but may be related more to the duration of hypocalcaemia and hyperphosphatemia than parathyroid hormone itself. Hyperphosphatemia promotes ectopic calcification, especially in blood vessel and periarticular tissue in renal failure, but in brain tissue in hypoparathyroidism. Participation of PTH receptor2 in the brain and superoxide production by mitochondria in hypoparathyroidism should be explored with reference to intracerebral calcification and neurodegenerative diseases.