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Living with Combined oxidative phosphorylation deficiency

A group of rare mitochondrial conditions that often start early and affect energy-hungry organs such as the brain, heart and liver.

Understanding Combined oxidative phosphorylation deficiency

Combined oxidative phosphorylation deficiency is a group of rare mitochondrial disorders that often begin early in life and affect multiple organs.

These disorders most often affect parts of the body that need a lot of energy, such as the brain, heart and liver. Gene changes interfere with how cells build the energy-making system (mitochondrial respiratory chain complexes). Symptoms vary widely.

Signs & symptoms

Symptoms vary widely. GARD's summary says they can include:

  • Muscle weakness
  • Developmental delay
  • Hearing loss
  • Heart problems
  • Problems with multiple organs

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include genetic specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    United Mitochondrial Disease Foundation and MitoAction may keep lists of experts for this condition.

Care & treatment

Care team
Genetic specialists (geneticists)
Expert care
Expert lists: United Mitochondrial Disease Foundation, MitoAction
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with United Mitochondrial Disease Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Which specific type do I or my child have?
Would genetic testing help find the exact gene?
Which organs should be checked regularly?

Quick facts

InheritanceMitochondrial

Changes in genes interfere with building and assembling the mitochondrial respiratory chain complexes. GARD lists mitochondrial inheritance.

GeneticMitochondrial

Patient organizations

Source: NIH GARD · Combined oxidative phosphorylation deficiencyGARD ID 12893 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Combined oxidative phosphorylation deficiency.

Explore the Combined oxidative phosphorylation deficiency blog

Explore research for Combined oxidative phosphorylation deficiency

Explore actively recruiting Combined oxidative phosphorylation deficiency studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Combined oxidative phosphorylation deficiency with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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