It is well known that most patients with hypoparathyroidism have radiologically detectable basal ganglia calcification. Not as well known is that the brain calcinosis may be more extensive. We describe a 55-year-old woman with a 44-year history of symptomatic idiopathic hypoparathyroidism who has extensive calcification of her cerebrum and cerebellum as well as her basal ganglia, evident on computed tomography of the head. When first evaluated here 32 years ago, plain radiography of the skull demonstrated calcification of both caudate and lentiform nuclei (basal ganglia). Despite fair control of her serum calcium level, she has developed focal seizures, possibly related to the calcinosis of her brain.