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BCR Detection in Blood (Qualitative/Quantitative by Immunoassay)

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

This test checks for the presence of the B-cell receptor (BCR) gene rearrangement, often used in evaluating blood cancers like chronic lymphocytic leukemia (CLL) or other hematologic disorders.

Quick summary

["Helps doctors diagnose or monitor certain blood-related cancers by detecting genetic changes in white blood cells."]

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

Key facts at a glance

LOINC
50195-7
Short code
t(9;22)(ABL1,BCR)/control Bld/T-LnRto
Synonyms
t(9;22)(ABL1,BCR)/control Bld/T-LnRto
Category
coagulation
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
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

Why This Test Matters in Cancer Care

The BCR test identifies specific genetic patterns in your blood cells that may indicate a blood disorder. These patterns can help determine if you have a condition like CLL or another type of lymphoma, and guide treatment decisions.

How the Test Works

Blood is drawn and analyzed using an immunoassay method to detect BCR rearrangements. The test may be qualitative (yes/no) or quantitative (measuring levels of rearranged DNA), depending on the clinical need.

Sample Collection and Preparation

Whole blood is collected in a special tube and sent to the lab. The lab processes the sample to isolate white blood cells, which are then tested for BCR gene changes.

What to Expect Before the Test

No special preparation is needed, but inform your doctor about any medications or recent illnesses that might affect results. Avoid strenuous activity before the blood draw if instructed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test plays a critical role in diagnosing and managing blood cancers by identifying genetic markers that differentiate normal cells from cancerous ones. It helps tailor treatment plans, such as targeted therapies or monitoring disease progression in chronic conditions like CLL.

Short name

BCR Status Test

Frequently asked questions

Will I need to fast before this test?
No fasting is required for this test. However, always follow your doctor’s instructions regarding medications or supplements you may be taking.
How long will it take to get my results?
Results are typically available within 1 to 3 business days, depending on lab processing times. Your healthcare provider will discuss the findings with you.
Could this test affect my treatment options?
Yes, the BCR test results may influence treatment decisions, especially for blood cancers. Your doctor will use these findings alongside other tests and clinical factors to create a personalized treatment plan.
  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