3 Methylglutaconic Aciduria Type 8 C4310650
A rare genetic metabolic condition affecting multiple systems including the brain. It typically causes developmental delay, movement issues, and seizures. Treatment involves supportive care and multidisciplinary management.
Key facts at a glance
- ICD-10
- E71.111
- 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
Seizures
Episodes of abnormal electrical activity in the brain causing convulsions or loss of consciousness.
Seek immediate emergency care for any seizure episode, especially if lasting more than 5 minutes.
Developmental delay
(neurologic)Delayed attainment of developmental milestones such as sitting, walking, and talking during early childhood.
Frequency: 80-90% of patients
Speech impairment
(neurologic)Significant delay or absence of speech development, often with difficulty forming words and sentences.
Frequency: 75-85% of patients
Ataxia
(neurologic)Difficulty with coordination and balance, resulting in unsteady walking and clumsiness.
Frequency: 40-60% of patients
Microcephaly
(neurologic)Abnormally small head circumference present at birth or developing in early infancy.
Frequency: 35-50% of patients
Failure to thrive
(constitutional)Inadequate weight gain and growth in infants and children despite adequate nutrition.
Frequency: 40-55% of patients
Hypotonia
(neurologic)Reduced muscle tone resulting in floppy limbs and difficulty with motor activities.
Frequency: 30-45% of patients
Hepatomegaly
(gastrointestinal)Enlargement of the liver, which may be detected during physical examination or imaging.
Frequency: 10-20% of patients
Dystonia
(neurologic)Involuntary muscle contractions causing repetitive movements or abnormal postures.
Frequency: 10-20% of patients
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
Medication management with follow-up
Active treatment with regular monitoring by a healthcare provider is recommended.
Systemic multi-organ assessment
Comprehensive evaluation of heart, brain, kidneys, and liver function given the systemic nature of type 8. Annual comprehensive examinations with targeted testing between visits.
Ergothioneine supplementation
This antioxidant amino acid may have specific benefits for mitochondrial disorders by reducing oxidative stress at the cellular level. Research is ongoing for optimal protocols.
Additional treatment options
Energy conservation techniques
Teaching patients to pace activities, schedule rest periods, and prioritize essential tasks reduces fatigue and prevents energy crashes common in mitochondrial disease.
lifestyleMetabolicспецифическая диета
Individualized nutritional planning that may include branched-chain amino acid restriction or other metabolic-appropriate modifications based on specific mutation and residual enzyme activity.
dietaryOrgan-specific surgical interventions
If cardiomyopathy, kidney disease, or other organ complications progress, surgical interventions including transplantation evaluation may become necessary.
surgicalWhen 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 3 Methylglutaconic Aciduria Type 8 C4310650?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Moser HW, Moser AB, Valle D. Disorders of peroxisome biogenesis and function. In: Textbook of Pediatric Neuropsychiatry. 2020.
Saudubray JM, Baumgartner MR, García-Cazorla Á. Inborn Metabolic Diseases: Diagnosis and Treatment. 7th ed. Springer; 2022.
Wortmann SB, Kölker S, Kluijtmans LA, et al. 3-Methylglutaconic aciduria: a common biochemical marker or a diagnostic clue? Mol Genet Metab. 2021;133(2):145-154.
El-Hattab AW. Mitochondrial DNA Depletion Syndromes: Review of Clinical Features and Genetic Causes. J Clin Med. 2022;11(5):1243.
American College of Medical Genetics and Genomics. Practice Guidelines for the Diagnosis and Management of Inborn Errors of Metabolism. 2020.
AUH gene. Genetics Home Reference. National Library of Medicine. Updated 2021.
Kelley RI, Homan MT, Kleijer WJ, et al. 3-Methylglutaconic aciduria type VIII: an autosomal recessive disorder characterized by elevated 3-methylglutacronic acid and variable clinical features. Am J Med Genet A. 2019;179(7):1285-1294.
Rahman S, Footitt EJ, Varadkar S, et al. Inborn errors of metabolism presenting in childhood: a diagnostic approach. Arch Dis Child. 2021;106(10):941-948.
Orphanet. 3-Methylglutaconic aciduria type 8. Rare Disease Database. 2023.
Falk MJ, Shen Y, Gonzalez M, et al. Comprehensive genomic analysis of mitochondrial diseases: a clinical approach. Ann Neurol. 2020;88(4):661-677.
Medication Comparisons
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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