Action myoclonus-renal failure syndrome

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Action myoclonus-renal failure syndrome

ORPHA:163696Disease

Also called AMRF · EPM4 · Myoclonus-nephropathy syndrome · Progressive myoclonic epilepsy type 4 · Progressive myoclonus epilepsy type 4

What it is

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.

Key facts

Prevalence
<1 / 1 000 000
Age of onset
Adolescent, Adult
Inheritance
Autosomal recessive
Classified as
Disease

Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.

Gene

SCARB2Disease-causing germline mutation(s) (loss of function)

ICD-10 codes

G40.4filed under a broader ICD-10 category — shared with 28 other rare diseases

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Benefit programs to look at

Programs whose eligibility touches the same ICD-10 categories. Eligibility is decided by the administering agency, never by this page.

Cross-references

MONDO 0009699OMIM 254900UMLS C0751779

Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.

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