Understanding Your Laboratory Test: A Complete Guide for Patients
A urine test that detects the presence of 2-methylcitrate, an organic acid that may indicate certain metabolic disorders.
{"2-Methylcitrate is a substance that can build up in urine when the body cannot properly break down certain amino acids","This test helps doctors diagnose inherited metabolic disorders like propionic or methylmalonic acidemia","The test is performed on a simple urine sample collected at home or in a clinic","Abnormal results may require further testing and consultation with a metabolic specialist"}
Key facts at a glance
- LOINC
- 29876-0
- Short code
- 2MCTU
- Synonyms
- 2Me-citrate Ur Ql
- Category
- chemistry
- Sample
- urine
- Container
- Sterile urine container (plastic or glass)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 0–120 years
- Method
- Gas Chromatography-Mass Spectrometry (GC-MS) or Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
- CPT
- 82542
- SNOMED
- 314383006
- Specimen volume
- 5-10 mL preferred, minimum 2 mL
- Stability
- Room temperature: 24 hours; Refrigerated (2-8°C): 7 days; Frozen (-20°C or below): 30 days. Transport to laboratory promptly.
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 24–72 hours
- Order
- routine
This test is a laboratory analysis performed on a sample of your blood, urine, or other body fluid to help your doctor evaluate how well your organs are working and to detect signs of infection, disease, or other health conditions that may need further medical attention.
The 2-Methylcitrate urine test detects whether this organic acid is present in your urine. Under normal conditions, the body produces very small amounts of 2-methylcitrate. However, when certain metabolic pathways are not working properly, 2-methylcitrate can accumulate and be detected in urine.
A trained healthcare professional will collect a small sample, most often by drawing blood from a vein in your arm using a sterile needle. The collection usually takes only a few minutes, and the sample is then sent to a certified laboratory where specialized equipment and trained staff complete the analysis.
You will be provided with a sterile container to collect a urine sample. For accurate results, it is best to collect the first morning urine, as it is more concentrated. Follow your healthcare provider's instructions on how to collect, store, and transport the sample. The sample is then sent to a laboratory where it is analyzed using specialized equipment.
Your results are compared with established reference ranges to show whether your values fall within normal limits. Results that are slightly outside the normal range do not always mean you have a serious condition, so your doctor will review the full report with you, explain what the numbers mean in the context of your symptoms and medical history, and recommend any follow-up testing or treatment if needed.
A 'positive' or 'present' result means that 2-methylcitrate was detected in your urine at levels higher than normal. This finding suggests that your body may have difficulty breaking down certain amino acids (isoleucine, valine, threonine, and methionine). A 'negative' or 'not present' result means that 2-methylcitrate was not found at abnormal levels, which is the expected normal result.
Reference range
Not detected (Negative)N/A
No special preparation required. Collect random urine sample in clean, sterile container. Inform laboratory of any medications or supplements being taken as certain substances may interfere with analysis. Patient should maintain normal hydration status.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Detection of 2-methylcitrate in urine is primarily used to help diagnose and monitor inherited metabolic disorders, particularly propionic acidemia and methylmalonic acidemia. These are rare genetic conditions where the body cannot properly process certain amino acids due to deficient enzymes. Early diagnosis is important for managing these conditions through special diets and medications. The test may also be used to monitor treatment effectiveness in patients already diagnosed with these metabolic disorders.
Frequently asked questions
Is this test painful?
Do I need to fast before this test?
What happens if my result is positive?
Can this test be done on children?
How long does it take to get results?
Sources
- 1
- 2
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This 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 16, 2026. · Read our editorial policy