Cutaneous B-Cell Lymphoma.

Area of Science:

• Dermatology
• Hematology
• Oncology

Background:

• Primary cutaneous B-cell lymphomas (pcBCL) are a group of non-Hodgkin lymphomas confined to the skin at diagnosis.
• Key subtypes include primary cutaneous marginal zone lymphoma, primary cutaneous follicle center lymphoma, and primary cutaneous diffuse large B-cell lymphoma, leg-type.
• Intravascular large B-cell lymphoma is often considered alongside pcBCL due to frequent diagnosis via skin biopsy.

Purpose of the Study:

• To provide a comprehensive overview of primary cutaneous B-cell lymphomas.
• To summarize clinical presentation, histopathology, and diagnostic evaluation.
• To outline treatment strategies and differential diagnoses for pcBCL.

Main Methods:

• This review synthesizes information from existing literature on pcBCL.
• It focuses on clinical, histological, and diagnostic aspects.
• Treatment and differential diagnosis are discussed based on current understanding.

Main Results:

• pcBCL present in the skin without systemic involvement at initial diagnosis.
• Histological similarity to extracutaneous lymphomas complicates diagnosis.
• Distinct subtypes have specific clinical and pathological features.

Conclusions:

• Accurate diagnosis of pcBCL requires careful integration of clinical, histological, and potentially molecular data.
• Distinguishing pcBCL from their systemic counterparts is crucial for appropriate management.
• This review serves as a guide for clinicians managing these rare lymphomas.