raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:329336

Adult-onset chronic progressive external ophthalmoplegia with mitochondrial myopathy

Synonyms: Adult-onset CPEO with mitochondrial myopathy

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant, Mitochondrial inheritance
Age of onset
Adult
Status
active

A rare mitochondrial disease characterized by adult onset of progressive external ophthalmoplegia, exercise intolerance, muscle weakness, manifestations of spinocerebellar ataxia (e.g. impaired gait, dysarthria) and mild motor peripheral neuropathy. Respiratory insufficiency has been reported in some cases.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAdult-onset chronic progressive external ophthalmoplegia with mitochondrial myopathyAdult-onset CPEO with mitochondrial myopathy
frOphtalmoplégie externe progressive chronique de l'adulte avec myopathie mitochondrialeOEP chronique de l'adulte avec myopathie mitochondriale
deOphthalmoplegie, chronische externe progressive, mit mitochondrialer Myopathie, adulte FormCPEO mit mitochondrialer Myopathie mit Beginn im Erwachsenenalter
esOftalmoplejía externa progresiva crónica con miopatía mitocondrial de inicio en el adultoCPEO del adulto con miopatía mitocondrial
itOftalmoplegia esterna progressiva cronica a esordio nell'età adulta con miopatia mitocondrialeCPEO a esordio nell'età adulta con miopatia mitocondriale
nlChronische progressieve externe oftalmoplegie met mitochondriale myopathie met aanvang op volwassen leeftijdCPEO met mitochondriale myopathie met aanvang op volwassen leeftijd
ptOftalmoplegia externa progressiva crónica com miopatia mitocondrial com início no adulto
plPrzewlekła postępująca oftalmoplegia zewnętrzna o początku w wieku dorosłym z miopatią mitochondrialnąCPEO o początku w wieku dorosłym z miopatią mitochondrialną
csChronická progresivní externí ofthalmoplegie nasedající v dospělosti s mitochondriální myopatiíCPEO s mitochondriální myopatií s nástupem v dospělosti
ukХронічна прогресуюча зовнішня офтальмоплегія з мітохондріальною міопатією у дорослихCPEO, що починається у дорослих з мітохондріальної міопатії
zh成人发病型慢性进行性外眼肌麻痹伴线粒体肌病成人发病型CPEO伴线粒体肌病
trMitokondriyal miyopati ile seyreden yetişkin başlangıçlı kronik ilerleyici eksternal oftalmoplejiMitokondriyal miyopati ile seyreden erişkin başlangıçlı CPEO

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM616479BTNTvalidated
ICD-10G71.3NTBTattributedvalidated
ICD-118C73.YNTBTattributedvalidated
MONDO0018002Evalidated
UMLSC4511138Evalidated

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 (6):

No children.

Codes that Orphanet moved or referred to this one:

4

Genes

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
RNASEH1Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:18466ENSG000001718656041232p25.3ribonuclease H126094573[PMID]
RRM2BDisease-causing germline mutation(s) inAssessedHGNC:17296ENSG000000483926047128q22.3ribonucleotide reductase regulatory TP53 inducible subunit M2B23107649[PMID]
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyNot yet validatedORPHANET

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

32 annotations · validated 2019-01-23
HPOTerm (as annotated by Orphanet)Diagnostic
Obligate (100%)
HP:0000590Progressive external ophthalmoplegia
Very frequent (99-80%)
HP:0003546Exercise intolerance
HP:0003690Limb muscle weakness
Frequent (79-30%)
HP:0002522Areflexia of lower limbs
HP:0001488Bilateral ptosis
HP:0003551Difficulty climbing stairs
HP:0001260Dysarthria
HP:0002015Dysphagia
HP:0003738Exercise-induced myalgia
HP:0030196Fatigable weakness of respiratory muscles
HP:0011968Feeding difficulties
HP:0000365Hearing impairment
HP:0000218High palate
HP:0003326Myalgia
HP:0002747Respiratory insufficiency due to muscle weakness
HP:0003202Skeletal muscle atrophy
HP:0030319Weakness of facial musculature
Occasional (29-5%)
HP:0005150Abnormal atrioventricular conduction
HP:0007256Abnormal pyramidal sign
HP:0003133Abnormality of the spinocerebellar tracts
HP:0001638Cardiomyopathy
HP:0002549Deficit in phonologic short-term memory
HP:0000565Esotropia
HP:0002141Gait imbalance
HP:0002406Limb dysmetria
HP:0002505Loss of ambulation
HP:0002076Migraine
HP:0003722Neck flexor weakness
HP:0000580Pigmentary retinopathy
HP:0002361Psychomotor deterioration
HP:0002650Scoliosis
HP:0007141Sensorimotor neuropathy

Run the differential on the 3 obligate / very frequent terms

Annotation source: 26094573[PMID]_23446635[PMID]_7732787[PMID]_22987704[PMID]

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Sources for this card