Hypoparathyroidism and other causes of hypocalcemia

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Hypoparathyroidism is a rare disorder most commonly caused by anterior neck surgery. Other causes include autoimmunity, iron or copper overload syndromes, metastatic infiltration of the parathyroid glands, ionizing radiation, and genetic familial causes including isolated or syndromic forms of hypoparathyroidism. Hypoparathyroidism is one of many causes of hypocalcemia. The differential diagnosis of hypocalcemia also includes PTH resistance, hypovitaminosis D from many causes, vitamin D resistance leading to rickets or osteomalacia, and a long list of divergent other causes. Regardless of the cause of hypocalcemia, symptoms usually include neuromuscular irritability leading to fingertip or toe tip tingling or numbness, muscle cramps, or tetany, but more severe forms may cause a spectrum of symptoms including bronchospasm, laryngospasm, seizures, cardiac rhythm disturbances, or sudden death. Signs of hypocalcemia include Chvostek’s and Trousseau’s signs, QTc interval prolongation, and brain and other soft tissue calcification. Treatment of hypocalcemia typically involves supplementation with calcium and vitamin D in different forms. Some patients benefit from supplementation with magnesium, thiazide-type diuretics, or parathyroid hormone analogues.

Original languageEnglish (US)
Title of host publicationEncyclopedia of Endocrine Diseases
PublisherElsevier
Pages192-203
Number of pages12
ISBN (Electronic)9780128122006
ISBN (Print)9780128121993
DOIs
StatePublished - Jan 1 2018

Keywords

  • Chvostek’s sign
  • Hypocalcemia
  • Hypomagnesemia
  • Hypoparathyroidism
  • Hypovitaminosis d
  • Parathyroid hormone
  • Pseudohypoparathyroidism
  • Tetany
  • Trousseau’s sign
  • Vitamin d resistance

ASJC Scopus subject areas

  • Medicine(all)

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