FLOW CYTOMETRY, CD 23

The Flow Cytometry CD23 Test is a specialized immunophenotyping assay used to detect and measure the expression of CD23, a cell surface glycoprotein primarily found on mature B lymphocytes and certain activated immune cells. CD23 functions as a low-affinity receptor for Immunoglobulin E (IgE) and plays an important role in immune regulation and B-cell activation.

Flow cytometry technology enables rapid analysis of thousands of cells within a sample, allowing precise identification of CD23-positive cell populations and their immunophenotypic characteristics. CD23 is commonly included in comprehensive flow cytometry panels used for diagnosing and classifying B-cell leukemias, lymphomas, and lymphoproliferative disorders.

One of the most important clinical applications of CD23 is in the evaluation of Chronic Lymphocytic Leukemia (CLL). CD23 expression, when interpreted alongside other markers such as CD5, CD19, CD20, and CD22, helps differentiate CLL from other B-cell neoplasms and contributes to accurate disease classification.

The test is typically performed on peripheral blood, bone marrow aspirates, lymph node specimens, or other clinically appropriate samples.

Benefits of the Test

• Identifies CD23-positive B-cell populations
• Assists in diagnosing Chronic Lymphocytic Leukemia (CLL)
• Supports lymphoma and leukemia classification
• Helps evaluate B-cell lymphoproliferative disorders
• Assists in disease monitoring and follow-up
• Provides valuable immunophenotypic information

Why Doctors Recommend This Test

Doctors may recommend Flow Cytometry CD23 testing for:

• Suspected Chronic Lymphocytic Leukemia (CLL)
• B-cell lymphoma evaluation
• Lymphoproliferative disorder investigation
• Abnormal lymphocyte counts
• Persistent lymphocytosis
• Bone marrow disorder assessment
• Monitoring hematological malignancies
• Comprehensive leukemia and lymphoma immunophenotyping

The test helps characterize abnormal B-cell populations and supports accurate diagnosis.

Preparation Before Test

The test may require:

• Peripheral blood sample
• Bone marrow aspirate
• Lymph node tissue
• Body fluid specimen
• Other clinically relevant samples

Preparation generally includes:

• No fasting is required
• Inform your physician about ongoing treatments
• Follow laboratory collection instructions

The sample is processed using advanced multiparameter flow cytometry systems.

Normal Reporting Time

Results are generally available within 1 to 3 working days, depending on laboratory workflow and panel complexity.

Who Should Take This Test?

• Patients with suspected CLL
• Individuals with abnormal lymphocyte counts
• Patients with suspected lymphoma
• Individuals undergoing bone marrow evaluation
• Patients with lymphoproliferative disorders
• Individuals referred by hematologists or oncologists

Flow Cytometry CD23 testing is an important tool for evaluating B-cell disorders and hematological malignancies.

Clinical Significance

CD23 expression may be observed in:

• Chronic Lymphocytic Leukemia (CLL)
• Small Lymphocytic Lymphoma (SLL)
• Certain B-cell Lymphomas
• Reactive B-cell Populations
• Mature B-cell Disorders
• B-cell Lymphoproliferative Disorders

The pattern of CD23 expression, combined with other immunophenotypic markers, helps distinguish different leukemia and lymphoma subtypes and guides clinical management.

Important Note

CD23 is not interpreted as a standalone marker. It is typically evaluated together with CD5, CD19, CD20, CD22, CD45, Kappa Light Chains, and Lambda Light Chains to establish a comprehensive immunophenotypic diagnosis.