Orphanet: Search a disease

Search for a rare disease

* (*) mandatory field

Other search option(s)

Suggest an update

(*) Required fields.


Only comments seeking to improve the quality and accuracy of information on the Orphanet website are accepted. For all other comments, please send your remarks via contact us. Only comments written in English can be processed.

Captcha image

Hypokalemic periodic paralysis

Disease definition

A rare genetic, muscle channelopathy characterized by recurrent episodic attacks of generalized muscle weakness associated with a decrease in blood potassium levels.


Classification level: Disorder
  • Synonym(s):
    • Westphall disease
  • Prevalence: 1-9 / 100 000
  • Inheritance: Autosomal dominant 
  • Age of onset: Childhood, Adolescent
  • ICD-10: G72.3
  • OMIM: 170400  613345
  • UMLS: C0238357  C0238358
  • MeSH: D020514
  • GARD: 6729
  • MedDRA: -

Detailed information

Article for general public


The documents contained in this web site are presented for information purposes only. The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.