<prompt> Chvostek sign is seen in:HypercalcemiaHypoparathyroidismInsulinomaDiabetes mellitus  <response>: Hypocalcemia Idiopathic hypoparathyroidism is associated with: Genetic syndrome of hypoparathyroidism, - Addison;s disease and - Mucocutaneous candid iasis Pseudohypoparathyroidism: No deficiency of parathormone, but target organ bone and kidney are unresponsive to its action Chvostek;s sign: Contraction of facial muscles, elicited by light tapping of the facial nerve ECG changes: Prolongation of QT interval REF: Harrison book of internal medicine 21ST EDITION 