title: Basilar artery narrowing and hyperparathyroidism: illustrative case.
abstract: A patient presenting with a pontine infarction caused by mid-basilar artery narrowing associated with hyperparathyroidism is described. The narrowing reversed with surgical removal of his parathyroid adenoma and normalization of his serum calcium. This patient's illness lends evidence to the role of calcium in cerebral vasoconstriction.
mesh_terms: D000236:Adenoma / Q000601:surgery; D000328:Adult; D001488:Basilar Artery / Q000473:pathology*; D002118:Calcium / Q000097:blood; D002533:Cerebral Angiography; D006801:Humans; D006961:Hyperparathyroidism / Q000473:pathology* / Q000601:surgery; D002546:Ischemic Attack, Transient / Q000473:pathology*; D008297:Male; D010282:Parathyroid Neoplasms / Q000601:surgery; D014661:Vasoconstriction
chemical_list: D002118:Calcium