raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:163696

Action myoclonus-renal failure syndrome

Synonyms: AMRF · EPM4 · Myoclonus-nephropathy syndrome · Progressive myoclonic epilepsy type 4 · Progressive myoclonus epilepsy type 4

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Adolescent, Adult
Status
active

A rare epilepsy syndrome characterized by progressive myoclonus epilepsy in association with primary glomerular disease. Patients present with neurologic symptoms (including tremor, action myoclonus, tonic-clonic seizures, later ataxia and dysarthria) that may precede, occur simultaneously or be followed by renal manifestations including proteinuria that progresses to nephrotic syndrome and end-stage renal disease. In some patients, sensorimotor peripheral neuropathy, sensorineural hearing loss and dilated cardiomyopathy are associated symptoms.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAction myoclonus-renal failure syndromeAMRF · EPM4 · Myoclonus-nephropathy syndrome · Progressive myoclonic epilepsy type 4 · Progressive myoclonus epilepsy type 4
frSyndrome de myoclonus d'action-insuffisance rénaleAMRF · EPM4 · Epilepsie myoclonique progressive type 4
deAktionsmyoklonus-Nierenversagen-SyndromAMRF · EPM4 · Myoklonus-Nephropathie-Syndrom · Myoklonusepilepsie, progressive, Typ 4
esSíndrome de mioclonías de acción-insuficiencia renalAMRF · EPM4 · Epilepsia mioclónica progresiva tipo 4 · Síndrome de mioclonías-nefropatía
itSindrome da mioclono d'azione e insufficienza renaleEPM4 · Epilessia mioclonica progressiva, tipo 4 · Sindrome mioclono-neuropatia
nlActiemyoclonus - nierfalen-syndroomAMRF · EPM4 · Myoclonus - nefropathie-syndroom · Progressieve myoclonische epilepsie type 4 · Progressive myoclonusepilepsie type 4
ptSíndrome mioclonias de ação - insuficiência renal
plZespół mioklonii prowokowanych ruchem i niewydolności nerekEPM4 · Postępująca padaczka miokloniczna typu 4 · Zespół mioklonii i nefropatii
csSyndrom zahrnující akční myoklonus a ledvinné selháníEPM4 · Syndrom zahrnující myoklonus a nefropatii · Progresivní myoklonická epilepsie, typ 4
ukСиндром рухового міоклонусу-ниркової недостатностіAMRF · EPM4 · Синдром міоклонус-нефропатії · Прогресуюча міоклонічна епілепсія типу 4 · Прогресуюча міоклонусна епілепсія типу 4
zh渐进型肌阵挛癫痫4,有或无肾功能衰竭进行性肌阵挛癫痫4型
trAksiyon miyoklonus-böbrek yetmezliği sendromuAMRF · EPM4 · Miyoklonus-nefropati sendromu · İlerleyici miyoklonik epilepsi tip 4 · İlerleyici miyoklonus epilepsi tip 4

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM254900Evalidated
ICD-10G40.4NTBTattributednot yet validated
ICD-11GB4ZNTBTindexvalidated
MONDO0009699Evalidated
UMLSC0751779Evalidated

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

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (2):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
SCARB2Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:1665ENSG000001387606022574q21.1scavenger receptor class B member 226677510[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families38 casesWorldwideCase(s)Validated26677510[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_26677510[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

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

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Sources for this card