Immunophenotypic variations of Burkitt lymphoma

Area of Science:

• Hematology
• Oncology
• Immunology

Background:

• Burkitt lymphoma (BL) typically presents with a distinct immunophenotype.
• This includes positivity for pan-B-cell antigens, CD10, and clonal surface immunoglobulins (SIgs).

Purpose of the Study:

• To evaluate the frequency and impact of atypical immunophenotypes in Burkitt lymphoma.
• To emphasize the importance of recognizing immunophenotypic variability for accurate BL diagnosis.

Main Methods:

• Retrospective analysis of 35 Burkitt lymphoma cases.
• Immunophenotypic analysis using flow cytometry and cytogenetic confirmation.
• Clinical data review including patient history and treatment outcomes.

Main Results:

• Four out of 35 BL cases (11.4%) exhibited atypical immunophenotypes.
• Atypical features included SIg light chain negativity, B-cell antigen negativity, CD10 negativity, and CD4 expression.
• Despite atypical features, morphologic and cytogenetic analyses confirmed BL.
• Treatment outcomes varied, with some patients achieving complete remission with combined chemotherapy and antiretroviral therapy.

Conclusions:

• Unusual immunophenotypes can occur in Burkitt lymphoma and may lead to diagnostic challenges if considered in isolation.
• Accurate diagnosis of BL necessitates considering morphology and cytogenetics alongside immunophenotype, acknowledging its potential variability.
• Awareness of atypical presentations is essential for timely and correct diagnosis and management of BL.