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Cerebrospinal Fluid Leukemia Marker Profile (CSF Leukemia Marker Screening)

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

This test measures certain substances in your cerebrospinal fluid (CSF) that may help identify leukemia or other blood-related conditions affecting the central nervous system.

Quick summary

["This test helps doctors assess potential blood disorders affecting your brain and spinal cord."]

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

Key facts at a glance

LOINC
49492-2
Short code
Leukemia markers CSF-Imp
Synonyms
Leukemia markers CSF-Imp
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like headaches, neurological issues, or if you’re at higher risk for leukemia or other blood disorders. It can also be part of monitoring for conditions like multiple myeloma or lymphoma.

What to Expect Before the Test

You’ll likely have a lumbar puncture (spinal tap) to collect CSF. This involves lying on your side, and a small needle is inserted into your lower back to draw fluid. You may feel pressure or mild discomfort, but it’s usually brief.

What the Test Measures

The test looks for specific markers (proteins or cells) in the CSF that may indicate leukemia or other blood disorders. These markers can include abnormal white blood cells, proteins like B-cell markers, or other substances tied to cancerous growths.

How the Results Are Used

Results help determine if leukemia or another blood disorder is present, how advanced it is, or whether treatment is working. Your doctor will compare findings to your symptoms and other tests.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CSF Leukemia Marker Screening

Frequently asked questions

What does a positive result mean?
A positive result may indicate leukemia or another blood disorder affecting the CSF, but it doesn’t confirm the diagnosis alone. Your doctor will review the results alongside other tests and symptoms to make a full assessment.
How long does it take to get results?
Results are typically available within a few days to a week, depending on lab processing and your healthcare provider’s workflow. Your doctor will discuss them with you during a follow-up visit.
Can I eat or drink before this test?
You can eat and drink normally before the test, as it doesn’t require fasting. However, inform your doctor about any medications or supplements you’re taking, as they may affect results.
  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