Histologically discordant lymphomas with B-cell and T-cell components

Area of Science:

• Hematology
• Oncology
• Immunology

Background:

• Lymphomas can exhibit diverse histological and immunophenotypic features.
• Discordant lymphomas with both B-cell and T-cell components are rare and poorly understood.
• Distinguishing between distinct neoplasms and clonal progression is critical for accurate diagnosis and treatment.

Purpose of the Study:

• To characterize the clinical, histologic, immunophenotypic, and genotypic features of histologically discordant lymphomas.
• To investigate the origin of these dual-component lymphomas, differentiating between distinct neoplasms and clonal evolution.
• To assess the prognostic implications and potential viral associations, such as Epstein-Barr virus (EBV).

Main Methods:

• Case series analysis of five patients with histologically discordant B-cell and T-cell lymphomas.
• Comprehensive evaluation including histology, immunophenotyping, and genotypic analysis.
• Clinical data review for patient demographics, disease presentation, treatment, and survival outcomes.

Main Results:

• Five cases were identified, presenting either sequentially or synchronously with B-cell and T-cell lymphomas.
• Immunophenotypic and genotypic analyses indicated the presence of two distinct lymphoid neoplasms in most cases.
• Patients had a median age of 66 years at initial diagnosis, with a poor prognosis and short survival after the discordant lymphoma diagnosis.
• Epstein-Barr virus was detected in a subset of cases, associated with both B-cell and T-cell components.

Conclusions:

• Histologically discordant lymphomas with B-cell and T-cell components likely represent independent neoplasms rather than a single evolving clone.
• These dual-component lymphomas are associated with aggressive disease and poor survival outcomes.
• A subset of these cases may be linked to Epstein-Barr virus, warranting further investigation into its role.