Autosomal dominant progressive external…

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Autosomal dominant progressive external ophthalmoplegia

ORPHA:254892Disease

Also called adPEO

What it is

A rare genetic, neuro-ophthalmological disease characterized by progressive weakness of the external eye muscles, resulting in bilateral ptosis and diffuse symmetric ophthalmoparesis. Additional signs may include skeletal muscle weakness, cataracts, hearing loss, sensory axonal neuropathy, ataxia, parkinsonism, cardiomyopathy, hypogonadism and depression. It is usually less severe than autosomal recessive form.

Key facts

Age of onset
Adolescent, Adult
Inheritance
Autosomal dominant
Classified as
Disease

Signs and symptoms

These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.

Genes

POLGDisease-causing germline mutation(s)
POLG2Disease-causing germline mutation(s)
RRM2BDisease-causing germline mutation(s)
SLC25A4Disease-causing germline mutation(s)
TWNKDisease-causing germline mutation(s)

ICD-10 codes

H49.4filed under a broader ICD-10 category — shared with 3 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.

Cross-references

MONDO 0008003OMIM 157640OMIM 609283OMIM 609286OMIM 610131OMIM 613077UMLS C5231255

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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