Mitochondrial Cytochrome C Oxidase Deficiency C4016626
A rare genetic disorder affecting mitochondria, the energy-producing structures in cells. It impairs energy generation, primarily affecting muscles, brain, and heart. Treatment focuses on symptom management and supportive care.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Severe lactic acidosis
Leigh syndrome
Fatigue or weight changes
(metabolic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Failure to thrive
(metabolic)Peripheral neuropathy
(metabolic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
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
Cytochrome C Oxidase Support Therapy
Supportive supplementation with Coenzyme Q10 and other electron carriers helps bypass complex IV deficiency and improves mitochondrial respiratory chain function.
Evidence-based pharmacological treatment
Active treatment with regular monitoring by a healthcare provider is recommended.
Ketogenic Diet Trial
A ketogenic diet provides alternative energy through ketone body metabolism, which may bypass defective complex IV and reduce reliance on impaired oxidative phosphorylation.
Additional treatment options
Creatine Monohydrate
Creatine helps maintain cellular energy reserves by stabilizing ATP, potentially reducing muscle weakness and exercise intolerance in patients with complex IV deficiency.
medicationMitochondrial-Optimized Exercise Program
A carefully structured exercise program combining aerobic and resistance training can help improve mitochondrial function through biogenesis and maintain muscle strength.
physical_therapyAlpha-Lipoic Acid Supplementation
Alpha-lipoic acid acts as an antioxidant and supports mitochondrial energy metabolism, potentially protecting against oxidative damage in complex IV deficiency.
complementaryWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is Mitochondrial Cytochrome C Oxidase Deficiency C4016626?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalMedication Comparisons
Compare medications used to treat Mitochondrial Cytochrome C Oxidase Deficiency C4016626. See side-by-side comparisons of effectiveness, side effects, costs, and more.
View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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