William's syndrome is associated with
High-Yield Explanation
A i.e. Congenital Supravalvular Aoic stenosis William's Syndrome or Idiopathic Hypercalcemia of Infancy It is characterized by: Hypercalcemia d/ t abnormal sensitivity to vitamin D Supravalvular aoic stenosisQ & other congenital defects Mental retardation Elfin facies (Round face with full cheeks & lips)