Immunophenotyping of paucicellular samples

Area of Science:

• Clinical laboratory science
• Immunology
• Hematology

Background:

• Paucicellular samples pose diagnostic challenges in routine flow cytometry (FC).
• Low cell counts in samples like fine needle aspirates (FNA), body fluids (BF), cerebrospinal fluid (CSF), and ocular fluid (OF) limit testing capabilities.
• Accurate immunophenotyping is crucial for lymphoma diagnosis and monitoring.

Purpose of the Study:

• To develop a method for maximizing diagnostic yield from paucicellular samples in FC.
• To enable comprehensive lymphocyte population analysis and aberrant cell detection from limited cellular material.
• To address the challenges of immunophenotyping rare cell populations.

Main Methods:

• Utilizes a combination of multiple monoclonal antibodies (MAbs).
• Employs a Boolean gating strategy for data analysis.
• Focuses on a single-tube approach to conserve precious cellular material.

Main Results:

• Successfully identifies and quantifies major lymphocyte populations.
• Enables detection of lymphomatous B cells.
• Facilitates identification of aberrant T cell expression in paucicellular samples.

Conclusions:

• The described protocol effectively extracts maximum diagnostic information from low-cell samples.
• This method enhances the utility of FC for diagnosing and monitoring lymphoid malignancies in challenging specimens.
• The single-tube approach with Boolean gating is vital for efficient analysis of paucicellular samples.