raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:99803

Haddad syndrome

Synonyms: Congenital central alveolar hypoventilation-Hirschsprung disease syndrome · Ondine-Hirschsprung disease · Ondine-Hirschsprung syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal dominant, Multigenic/multifactorial
Age of onset
Infancy, Neonatal
Status
active

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

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enHaddad syndromeCongenital central alveolar hypoventilation-Hirschsprung disease syndrome · Ondine-Hirschsprung disease · Ondine-Hirschsprung syndrome
frSyndrome de HaddadMaladie d'Ondine-Hirschsprung · Syndrome d'Ondine-Hirschsprung · Syndrome d'hypoventilation alvéolaire centrale congénitale-maladie de Hirschsprung
deHaddad-Syndrom
esSíndrome de HaddadEnfermedad de Ondine-Hirschsprung · Hipoventilación alveolar central congénita-enfermedad de Hirschsprung · Síndrome de Ondine-Hirschsprung
itSindrome di HaddadIpoventilazione alveolare centrale congenita - malattia di Hirschsprung · Malattia di Ondine-Hirschsprung · Sindrome di Ondine-Hirschsprung
nlSyndroom van HaddadCongenitale centrale alveolaire hypoventilatie - ziekte van Hirschsprung-syndroom · Syndroom van Ondine-Hirschsprung · Ziekte van Ondine-Hirschsprung
ptSíndrome de Haddad
plZespół HaddadaChoroba Ondine'a i Hirschsprunga · Wrodzona ośrodkowa hipowentylacja pęcherzykowa - choroba Hirschsprunga · Zespół Ondine'a i Hirschsprunga
csHaddadův syndromSyndrom zahrnující vrozenou centrální alveolární hypoventilaci a Hirschsprungovu nemoc · Ondinina kletba s Hirschprungovou nemocí
ukСиндром ХаддадаСиндром вродженої центральної альвеолярної гіповентиляції - хвороба Гіршпрунга · Хвороба Ондіна-Гіршпрунга · Синдром Ондіна-Гіршпрунга
zhHaddad综合征先天性中央肺泡低通气-先天性巨结肠综合征
trHaddad sendromuOndine-Hirschsprung hastalığı · Ondine-Hirschsprung sendromu · Doğumsal santral alveolar hipoventilasyon-Hirschsprung hastalığı sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM209880NTBTvalidated
ICD-10G47.3NTBTattributedvalidated
ICD-11LD2F.1YNTBTindexvalidated
MONDO0020493Evalidated
UMLSC1859049Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (8):

No children.

4

Genes

3 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
ASCL1Disease-causing germline mutation(s) inAssessedHGNC:738ENSG0000013935210079012q23.2achaete-scute family bHLH transcription factor 1
PHOX2BDisease-causing germline mutation(s) inAssessedHGNC:9143ENSG000001091326038514p13paired like homeobox 2B
RETDisease-causing germline mutation(s) inAssessedHGNC:9967ENSG0000016573116476110q11.21ret proto-oncogene9565426[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families60 casesWorldwideCase(s)ValidatedORPHANET
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

19 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0012332Abnormal autonomic nervous system physiology
HP:0002251Aganglionic megacolon
HP:0005957Breathing dysregulation
HP:0007110Central hypoventilation
HP:0010536Central sleep apnea
HP:0001508Failure to thrive
HP:0001518Small for gestational age
HP:0000486Strabismus
Frequent (79-30%)
HP:0001522Death in infancy
HP:0002020Gastroesophageal reflux
HP:0001252Hypotonia
HP:0001249Intellectual disability
HP:0001250Seizure
Occasional (29-5%)
HP:0001558Decreased fetal movement
HP:0003005Ganglioneuroma
HP:0003006Neuroblastoma
HP:0001562Oligohydramnios
HP:0001561Polyhydramnios
HP:0000407Sensorineural hearing impairment

Run the differential on the 8 obligate / very frequent terms

Annotation source: 26086998[PMID]

7

Sources for this card