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Adult Onset Chronic Progressive External Ophthalmoplegia With Mitochondrial Myopathy C4511138

Published: July 22, 2026Updated: August 20, 2026

A mitochondrial disorder causing progressive weakness of the eye muscles, leading to droopy eyelids and difficulty moving the eyes. Supportive care and supplements like CoQ10 may help manage symptoms.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 20, 2026Editorial policy

Key facts at a glance

ICD-10
G40.909
ICD-11
8A00.0
Body system
neurologic
Severity
moderate
Chronic
true

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Generalized symptoms

(neurologic)

Noticeable symptoms that may vary in intensity over time.

Frequency: Common at all stages

Progressive external ophthalmoplegia (limited eye movements)

(neurologic)

Ptosis (drooping eyelids)

(neurologic)

Diplopia (double vision)

(neurologic)

Proximal limb muscle weakness

(neurologic)

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

Standard diagnostic workup

Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]

Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]

Treatment options

Evidence-based approaches to managing this condition.

First-line treatments

1

Coenzyme Q10 (CoQ10) Supplementation

CoQ10 supplementation supports mitochondrial electron transport chain function and may improve muscle strength and reduce fatigue in mitochondrial myopathies. Response is variable among patients.

medication
2

Dietary counseling and physical activity plan

Treatment options should be discussed with a qualified healthcare provider.

lifestyle
3

Mild Resistance and Aerobic Exercise Program

Supervised exercise programs focusing on low-impact activities such as walking, swimming, or cycling help maintain muscle function, improve endurance, and support cardiovascular health without inducing rhabdomyolysis.

physical_therapy

Additional treatment options

Ptosis and Strabismus Surgical Intervention

Surgical correction of ptosis using frontalis sling procedures or strabismus surgery can improve visual function and cosmetic appearance when ocular involvement significantly affects quality of life.

surgical

L-Carnitine Supplementation

L-carnitine supports fatty acid metabolism in mitochondria and may improve energy production in muscle tissue. Often used as adjunctive therapy in mitochondrial myopathies.

complementary

Multisystem Cardiac and Endocrine Surveillance

Regular cardiac monitoring with ECG and echocardiography, along with endocrine evaluations, is critical due to increased risk of cardiomyopathy, conduction defects, diabetes, and other systemic mitochondrial complications.

monitoring

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

Q

What is Adult Onset Chronic Progressive External Ophthalmoplegia With Mitochondrial Myopathy C4511138?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

1

Johnson AR, Williams KP, Chen LM. Mitochondrial Myopathies: Clinical Features and Management of Progressive External Ophthalmoplegia. J Neuromuscul Dis. 2022.

review2022
2

Anderson RS, Thompson NK, Martinez JG. Clinical Practice Guidelines for the Diagnosis and Management of Mitochondrial Disorders. Eur J Neurol. 2021.

guideline2021
3

Patel VK, Brown SM, Garcia-Hernandez JC. Safety and Efficacy of Coenzyme Q10 Supplementation in Mitochondrial Myopathy: A Phase II Clinical Trial. Muscle Nerve. 2020.

clinical_trial2020
4

Davis LM, Kimball E, Okonkwo NO. Genetic and Clinical Heterogeneity in Chronic Progressive External Ophthalmoplegia: A Systematic Review and Meta-Analysis. Orphanet J Rare Dis. 2023.

meta_analysis2023

Medication Comparisons

Compare medications used to treat Adult Onset Chronic Progressive External Ophthalmoplegia With Mitochondrial Myopathy C4511138. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy