Mitochondrial Complex I Deficiency Nuclear Type 21 C4748792
A genetic condition affecting mitochondrial energy production, potentially impacting various organ systems. Often involves muscles, brain, and heart tissue. Management is supportive and symptom-focused.
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
Stroke-like episodes
Fatigue or weight changes
(metabolic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Encephalopathy
(metabolic)Microcephaly
(metabolic)Liver dysfunction
(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
Combination drug regimen with regular assessment
Active treatment with regular monitoring by a healthcare provider is recommended.
N-Acetylcysteine Administration
Antioxidant therapy with NAC to reduce oxidative stress and support glutathione production, potentially protecting mitochondrial function.
Metabolic and Lactate Monitoring
Regular blood lactate levels, pyruvate, and metabolic panels to assess disease activity and treatment response.
Additional treatment options
Glucose Polymer Supplementation
Complex carbohydrate supplementation to provide steady glucose availability and reduce reliance on impaired oxidative phosphorylation.
dietaryRespiratory Muscle Training
Targeted exercises to maintain respiratory muscle strength and prevent pulmonary complications common in mitochondrial disease.
physical_therapyVitamin E and Selenium Therapy
Additional antioxidant support with vitamin E and selenium to complement CoQ10 therapy and reduce lipid peroxidation damage.
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 Complex I Deficiency Nuclear Type 21 C4748792?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy