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Cerebrospinal Fluid 2-Amino-4-Hydroxy-6-Pteridine Concentration

Published: August 9, 2026Updated: August 16, 2026

This test measures the concentration of a specific organic compound found in cerebrospinal fluid (CSF), which may help diagnose certain neurological conditions.

Quick summary

["This test may be used to assess metabolic or genetic disorders affecting CSF chemistry."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
80165-4
Short code
2-Amino-4OH-pteridine CSF-sCnc
Synonyms
2-Amino-4OH-pteridine CSF-sCnc
Category
coagulation
Sample
csf
Container
Sterile tube
Units
N/A
Ref low
0.8
Ref high
1.2
Critical range
— – 5 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
85610
SNOMED
396252006
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like developmental delays, neurological issues, or signs of metabolic disorders. It could also be part of a broader evaluation for conditions affecting CSF chemistry, such as certain genetic or enzymatic deficiencies.

What to Expect Before the Test

No special preparation is typically needed. You may receive a spinal tap (lumbar puncture) to collect CSF, which is usually done in a hospital or clinic setting. The procedure is generally safe but may cause mild discomfort.

What the Test Results Mean

Abnormal levels of this compound in CSF could indicate underlying metabolic or genetic conditions affecting pteridine metabolism. Your results will be interpreted by a healthcare provider in the context of your symptoms and medical history.

Common Conditions Monitored

This test may be used to monitor conditions such as hereditary disorders involving pterin metabolism, including certain forms of neurological or developmental disorders.

Reference range

INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A

Specimen: csf

Inform your healthcare provider if you are taking blood thinners. No special preparation required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CSF Pteridine Level

Frequently asked questions

What causes abnormal CSF pteridine levels?
Abnormal levels may arise from inherited metabolic disorders, enzyme deficiencies, or conditions affecting CSF production or composition. Genetic testing or further metabolic studies may be needed to determine the exact cause.
How often should this test be repeated?
Frequency depends on your condition and healthcare provider’s recommendations. If this test is part of ongoing monitoring, follow-up may occur at intervals set by your provider, often based on symptom progression or test results from prior evaluations.
Can lifestyle changes affect this test result?
Generally, lifestyle factors like diet or activity levels may not directly influence this specific CSF test result. However, if you have underlying conditions, managing them as advised by your healthcare provider is important for overall health.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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