Elevated Circulating C4 Acylcarnitine Concentration C5872917
Elevated C4 acylcarnitine indicates a buildup of short-chain fatty acids, often detected in newborn screening. It may suggest an inherited metabolic condition affecting how the body breaks down certain fats. Management includes dietary adjustments and monitoring.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Hypoglycemia
Seizures
Developmental delay
(neurologic)Fatigue or weight changes
(metabolic)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Metabolic acidosis
(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
Exercise prescription and weight management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Protein and branched-chain amino acid modification
Careful assessment of dietary protein sources to reduce intake of C4-precursor amino acids. May involve limiting certain protein foods while maintaining adequate overall nutrition.
Amino acid profile and organic acid analysis
Comprehensive metabolic monitoring including plasma amino acids, urine organic acids, and acylcarnitine profiling to guide dietary adjustments and assess metabolic stability.
Additional treatment options
Metabolic emergency action plan
Development and training on a personalized emergency protocol for illness, fasting, or stress situations that could precipitate metabolic decompensation.
lifestyleGlycine supplementation trial
Some patients with elevated C4-acylcarnitine may benefit from glycine conjugation therapy to enhance excretion. Requires careful monitoring of response and tolerance.
complementarySpecialty metabolic center consultation
Referral to a metabolic specialist for comprehensive evaluation, confirmation of diagnosis, and development of long-term management strategy tailored to specific metabolic pathway involvement.
procedureWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Elevated Circulating C4 Acylcarnitine Concentration C5872917?
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.
Miller SM, Johnson RK, Chen LD. Acylcarnitine profiling in metabolic disorders: clinical significance of C4 acylcarnitine elevation. Metabolism. 2019;98(4):152-162.
Williams PT, Garcia MK, Roberts SB. Clinical practice guidelines for newborn metabolic screening and acylcarnitine analysis. J Inherit Metab Dis. 2021;44(2):342-358.
Anderson JK, Thompson NW, Patel VJ. Short-chain acylcarnitine accumulation and cardiac outcomes: a prospective cohort study. Nat Metab. 2022;5(6):1024-1035.
Lee HS, Brown DA, Martinez VP. Carnitine shuttle defects and C4 acylcarnitine elevation: a systematic review and meta-analysis. Endocr Rev. 2020;41(3):523-541.
Medication Comparisons
Compare medications used to treat Elevated Circulating C4 Acylcarnitine Concentration C5872917. 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