Systemic involvement in mycosis fungoides.

Area of Science:

• Dermatology
• Oncology
• Hematology

Background:

• Mycosis fungoides (MF) is the most common type of cutaneous T-cell lymphoma (CTCL), accounting for over half of primary cutaneous lymphomas.
• MF progresses through distinct stages (IA-IVB), initially presenting with subtle inflammatory signs before developing abnormal tumor cells.
• Historical classification challenges and evolving diagnostic methods have complicated MF understanding.

Purpose of the Study:

• To review the current understanding of Mycosis Fungoides (MF) and Cutaneous T-cell Lymphoma (CTCL).
• To highlight diagnostic challenges, particularly in early disease stages.
• To discuss the systemic nature of MF and patterns of extracutaneous involvement.

Main Methods:

• Literature review of Mycosis Fungoides (MF) and Cutaneous T-cell Lymphoma (CTCL).
• Analysis of diagnostic criteria and classification evolution.
• Examination of studies on extracutaneous involvement across MF stages.

Main Results:

• MF is a systemic disease from its early stages, despite initial skin manifestations.
• Early MF diagnosis is difficult due to its resemblance to inflammatory skin conditions.
• Extracutaneous involvement varies significantly based on diagnostic methods and disease stage, with lymph nodes, liver, spleen, and lungs being commonly affected.

Conclusions:

• Mycosis Fungoides (MF) is a complex cutaneous T-cell lymphoma (CTCL) requiring comprehensive diagnostic approaches.
• Recognizing MF as a systemic disease early is crucial for effective management.
• Further research is needed to refine diagnostic criteria and understand the full spectrum of extracutaneous involvement in MF.