CD2-Positive Blast Cells, Bone Marrow — Arbitrary Concentration
Measures CD2-positive blast cells in a bone marrow sample. This marker may be used during leukemia or lymphoma evaluation to characterize abnormal immature immune cells.
["The test shows whether immature cells in the bone marrow carry the CD2 protein, which can help classify certain blood cancers."]
Key facts at a glance
- LOINC
- 51112-1
- Short code
- CD2 Blasts Mar-aCnc
- Synonyms
- CD2 Blasts Mar-aCnc
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Critical range
- — – 500 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 84484
- SNOMED
- 302774002
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What is this test?
Blasts are immature cells that normally develop into blood or immune cells. This test looks for blasts that carry CD2, a protein found on many T lymphocytes, in a bone marrow sample.
Why might I need this test?
This test is generally used when leukemia, lymphoma, or another blood disorder is being evaluated. It helps determine the type and origin of abnormal cells when considered with other laboratory and genetic findings.
How is the test performed?
A bone marrow sample is collected and examined for blast cells that express CD2. Testing is commonly performed by flow cytometry, although the laboratory may use another validated method to assess the marker.
How do I prepare for the test?
No special preparation is usually required. Bone marrow aspiration is performed by a trained clinician, often with local anesthetic; follow your healthcare provider's instructions about medications and any procedure-specific precautions.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
An increased number of CD2-positive blasts may occur in certain T-cell leukemias and lymphomas. However, CD2 is not specific to one condition, and results must be interpreted with the number and appearance of blasts and findings from other markers, cytogenetics, and clinical evaluation. A positive result alone does not establish a cancer diagnosis.
Short name
CD2-positive blasts
Frequently asked questions
What does a positive CD2 blast result mean?
Does this test diagnose leukemia by itself?
Is a bone marrow biopsy always required?
Sources
- 1
- 2Lab Tests OnlineSource
- 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 17, 2026. · Read our editorial policy