Hypoparathyroidism is a rare disorder. It occurs after surgery for thyroid disorders, primary or secondary hyperparathyroidism, and laryngeal malignancies. The estimated number of neck surgeries performed in the US, based on data from 2007 to 2008, is 118,000 cases.[4][5] Of these surgeries, approximately 7.6% lead to either transient (75%) or permanent (25%) hypoparathyroidism. There are approximately 8900 new cases of hypoparathyroidism in the US annually.

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