raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:166412

Hot water reflex epilepsy

Synonyms: HWE

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
All ages
Status
active

Hot water reflex epilepsy is a rare neurologic disease characterized by the onset of generalized or focal seizures following immersion of the head in hot water, or with hot water being poured over the head. Primary generalized tonic-clonic seizures have been reported in rare cases.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enHot water reflex epilepsyHWE
frEpilepsie réflexe à l'eau chaude
deWarmwasser-ReflexepilepsieHWE · Warmwasser-Epilepsie
esEpilepsia refleja por agua caliente
itEpilessia riflessa da acqua calda= en
nlHeet water-reflexepilepsieHWE · Reflexepilepsie door contact met heet water
ptEpilepsia reflexa a água quente= en
plPadaczka prowokowana ciepłą wodą= en
csReflexní epilepsie indukovaná horkou koupelí= en
ukЕпілепсія з рефлекторними судомами, повязаними з дією високих температур
zh热水反射性癫痫
trSıcak su refleks epilepsisi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM613339Evalidated
OMIM613340BTNTvalidated
ICD-10G40.5NTBTattributedvalidated
ICD-118A61.40NTBTindexvalidated
MONDO0013229Evalidated
UMLSC4706506Evalidated

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.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
SLC1A1Disease-causing germline mutation(s) inAssessedHGNC:10939ENSG000001066881335509p24.2solute carrier family 1 member 128324217[PMID]
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 100 0004 / 100 000WorldwideValue and classValidated27986877[PMID]_29403278[PMID]_ORPHANET

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

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card