Haddad syndrome

What is Haddad syndrome?

Haddad syndrome is a rare congenital disorder in which congenital central hypoventilation syndrome (CCHS), or Ondine syndrome, occurs concurrently with Hirschsprung disease (see these terms).

Other condition names

  • Congenital central alveolar hypoventilation-Hirschsprung disease syndrome
  • Ondine-Hirschsprung disease
  • Ondine-Hirschsprung syndrome

Inheritance type

Autosomal dominant, Multigenic/multifactorial


  • Worldwide: <1 in 1,000 000

Age of Onset

  • Infancy
  • Neonatal
Orphadata: Free access data from Orphanet. © INSERM 1999. Available on "https://www.orphadata.com". Data version 1.3.16 / 4.1.7.