Flow Cytometry and Effusions in Lymphoproliferative Processes and Other Hematologic Neoplasias

Area of Science:

• Hematopathology
• Cytopathology
• Immunology

Background:

• Distinguishing reactive lymphocytosis from indolent lymphoma in effusions is difficult using microscopy alone.
• Flow cytometry (FC) is a valuable tool for analyzing body cavity fluids.
• FC aids in diagnosing new lymphomas and managing known hematologic malignancies.

Purpose of the Study:

• To review recent studies on flow cytometry applications in body cavity effusions for hematologic neoplasia.
• To emphasize an integrative diagnostic approach combining microscopy, immunophenotyping, and molecular data.
• To provide cytopathologists with advanced diagnostic perspectives aligned with WHO classifications.

Main Methods:

• Review of published literature on flow cytometry in effusion analysis.
• Integration of microscopical, immunophenotypical, and molecular findings.
• Interpretation of results within the framework of the WHO classification of hematolymphoid malignancies.

Main Results:

• Flow cytometry significantly enhances the diagnostic accuracy of lymphocyte-rich effusions.
• An integrative approach improves the differentiation between reactive and neoplastic processes.
• FC provides crucial data for diagnosing indolent lymphomas and other hematologic malignancies.

Conclusions:

• Flow cytometry is indispensable for advanced diagnostics in body cavity effusions.
• Integrating FC with other methods offers new perspectives for cytopathologists.
• This approach supports accurate classification and management of hematologic neoplasia.