CD2-Positive Blasts, Whole Blood — Cell Concentration
Measures the concentration of blast cells carrying the CD2 protein in whole blood, usually as part of a leukemia or lymphoma workup.
["This test helps evaluate whether abnormal blood cells express CD2, but results must be interpreted with other findings."]
Key facts at a glance
- LOINC
- 51113-9
- Short code
- CD2 Blasts Bld-aCnc
- Synonyms
- CD2 Blasts Bld-aCnc
- Category
- liver
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- 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
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What is this test?
Blasts are immature blood cells. This test measures the concentration of blasts that carry CD2, a protein found on certain T cells and natural killer cells. It is generally used as part of evaluating a suspected blood cancer.
Why might I need this test?
A clinician may order this test when abnormal blood counts or other findings suggest leukemia or lymphoma. Measuring CD2 on blast cells helps classify the type of abnormal cells.
How is the test performed?
A whole-blood sample is analyzed in the laboratory to identify and count blast cells that express CD2. This is commonly performed using flow cytometry or related cell-identification methods.
How do I prepare for the test?
No special preparation is usually needed. Follow any instructions from your clinician, and tell the laboratory if the sample was collected recently or if there are concerns about timing.
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 concentration of CD2-positive blasts may occur in certain leukemias or lymphomas involving T-cell or natural killer-cell lineages. CD2 expression alone cannot diagnose a specific cancer and must be interpreted with the blood count, cell appearance, and the results of other markers. A low or absent result does not by itself establish a disease.
Short name
CD2-positive blast count
Frequently asked questions
Does a CD2-positive blast result mean I have cancer?
Why are other flow-cytometry markers tested?
Can this test be performed on a routine blood sample?
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