raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:930

Idiopathic achalasia

Synonyms: Achalasia cardia · Idiopathic achalasia of esophagus · Primary achalasia

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive, Not applicable
Age of onset
All ages
Status
active

Idiopathic achalasia (IA) is a primary esophageal motor disorder characterized by loss of esophageal peristalsis and insufficient lower esophageal sphincter (LES) relaxation in response to deglutition.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enIdiopathic achalasiaAchalasia cardia · Idiopathic achalasia of esophagus · Primary achalasia
frAchalasie oesophagienne idiopathiqueAchalasie du cardia · Achalasie idiopathique de l'oesophage · Achalasie primaire de l'oesophage · Achalasie primitive de l'oesophage · Mégaoesophage idiopathique
deAchalasie, idiopathischeAchalasie, primäre · Idiopathische Achalasie des Ösophagus · Kardiaachalasie
esAcalasia idiopáticaAcalasia del cardias · Acalasia idiopática del esófago · Acalasia primaria
itAcalasia idiopaticaAcalasia del cardias · Acalasia idiopatia dell'esofago · Acalasia primitiva
nlIdiopathische achalasieAchalasia cardia · Idiopathische achalasie van de slokdarm · Primaire achalasie
ptAcalasia idiopáticaAcalasia esofágica familiar
plAchalazja idiopatycznaAchalazja wpustu · Idiopatyczna achalazja przełyku · Pierwotna achalazja przełyku
csIdiopatická achalázieAchalázie kardie · Idiopatické achalázie jícnu · Primární achalázie · Ezofagokardiální achalázie
ukІдіопатична ахалазіяАхалазія серця · Ідіопатична ахалазія стравоходу · Первинна ахалазія
zh特发性贲门失弛缓症特发性食管失弛缓症
trİdiyopatik akalazyaAkalazya kardia · Primer akalazya · Yemek borusunun idiyopatik akalazisi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM200400BTNTvalidated
ICD-10K22.0Especificvalidated
ICD-11DA21.0NTBTindexvalidated
MONDO0019635Evalidated
MeSHC536011Evalidated
UMLSC0859976Evalidated
GARD5708Evalidated
MedDRA10036669Evalidated

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 (1):

No children.

Codes that Orphanet moved or referred to this one:

4

Genes

4 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
CRLF1Disease-causing germline mutation(s) inAssessedHGNC:2364ENSG0000000601660423719p12cytokine receptor like factor 127976805[PMID]
NOS1Disease-causing germline mutation(s) inAssessedHGNC:7872ENSG0000008925016373112q24.22nitric oxide synthase 125479138[PMID]
HLA-DQA1Major susceptibility factor inAssessedHGNC:4942ENSG000001967351468806p21.32major histocompatibility complex, class II, DQ alpha 124997987[PMID]
HLA-DQB1Major susceptibility factor inAssessedHGNC:4944ENSG000001793446043056p21.32major histocompatibility complex, class II, DQ beta 124997987[PMID]
5

Prevalence and incidence

13 records
TypeClassValueAreaQualificationValidationSource
Prevalence at birth1-9 / 1 000 000—EuropeClass onlyNot yet validated23871090[PMID]
Point prevalence1-9 / 100 0008 / 100 000WorldwideValue and classValidated11319059[PMID]
Point prevalence1-5 / 10 00010.82 / 100 000CanadaValue and classValidated20465592[PMID]
Point prevalence1-9 / 100 0006.29 / 100 000Korea, Republic ofValue and classValidated24753707[PMID]
Point prevalence1-5 / 10 00013.5 / 100 000IrelandValue and classValidated3423207[PMID]
Point prevalence1-9 / 100 0008.7 / 100 000IcelandValue and classValidated17420933[PMID]
Point prevalence1-9 / 100 0001.8 / 100 000SingaporeValue and classValidated10482430[PMID]
Annual incidence1-9 / 100 0001.59 / 100 000ItalyValue and classValidated21116729[PMID]
Annual incidence1-9 / 1 000 0000.73 / 100 000IcelandValue and classValidated17420933[PMID]
Annual incidence1-9 / 1 000 0000.3 / 100 000SingaporeValue and classValidated10482430[PMID]
Annual incidence1-9 / 1 000 0000.39 / 100 000Korea, Republic ofValue and classValidated24753707[PMID]
Annual incidence1-9 / 100 0001.63 / 100 000CanadaValue and classValidated20465592[PMID]
Annual incidence1-9 / 1 000 0000.77 / 100 000WorldwideValue and classValidated11319059[PMID]

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

10 annotations · validated 2020-02-06
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002015Dysphagia
Frequent (79-30%)
HP:0012387Bronchitis
HP:0100749Chest pain
HP:0012735Cough
HP:0002020Gastroesophageal reflux
HP:0001824Weight loss
Occasional (29-5%)
HP:0031085Decreased circulating prealbumin concentration
HP:0004395Malnutrition
HP:0002100Recurrent aspiration pneumonia
HP:0030828Wheezing

Run the differential on the 1 obligate / very frequent terms

Annotation source: 23871090[PMID]_31451984[PMID]

7

Sources for this card