Cutaneous manifestations of lymphoma
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Overview of Cutaneous Manifestations in Lymphoma
Cutaneous manifestations of lymphoma are diverse and can arise either as primary skin lymphomas or as secondary involvement from systemic disease. These skin findings are important for diagnosis, prognosis, and monitoring of lymphoma activity, and they often reflect the underlying biological behavior of the disease Sander2001Rubio-Gonzalez2017Carlesimo2014+1 MORE.
Primary Cutaneous Lymphomas: Types and Clinical Features
Primary cutaneous lymphomas are a heterogeneous group, mainly divided into cutaneous T-cell lymphomas (CTCL) and cutaneous B-cell lymphomas. CTCLs, such as mycosis fungoides and cutaneous CD30+ lymphoproliferative disorders, are the most common, accounting for about 80% of cases. They typically present with patches, plaques, or tumors, and may follow an indolent or aggressive course depending on the subtype Rubio-Gonzalez2017Dummer2021Kempf2021.
- Mycosis Fungoides: Characterized by an evolution from flat patches to thicker plaques and, in some cases, tumors. Early lesions may resemble eczema or psoriasis .
- Primary Cutaneous CD8+ Acral T-cell Lymphoma: Presents with distinct clinical and histological features and generally has an excellent prognosis .
- Aggressive CTCL Subtypes: Such as primary cutaneous aggressive epidermotropic CD8+ T-cell lymphoma and gamma/delta T-cell lymphoma, present with rapidly developing necrotic or ulcerated plaques and tumors, and have a poor prognosis .
Secondary Cutaneous Involvement in Systemic Lymphomas
Systemic lymphomas, including non-Hodgkin lymphomas and peripheral T-cell lymphomas, can also involve the skin. These secondary cutaneous lymphomas often present as nodules, plaques, or ulcerations. The presence and pattern of skin lesions can parallel systemic disease activity and may serve as an early warning sign of relapse or progression Schowalter2012Carlesimo2014Zanardi2025.
- ALK-Positive Anaplastic Large Cell Lymphoma (ALCL): May present with tumoral skin lesions, nodules, or ulcerations. Disseminated skin lesions within six months of diagnosis are associated with a worse prognosis .
- Peripheral T-cell Lymphoma (PTCL): Skin involvement is less common but, when present, can indicate disease activity and help monitor response to therapy .
Cutaneous Manifestations in Specific Lymphoma Subtypes
- Adult T-cell Leukemia/Lymphoma (ATLL): Caused by HTLV-1 infection, ATLL frequently affects the skin, sometimes as the first sign of disease. Lesions are polymorphous and can be specific (direct infiltration), non-specific, or infectious. The type of skin eruption can help predict prognosis Miyashiro2020Pezeshkpoor2008.
- T-Lymphoblastic Lymphoma: Rarely presents with skin involvement, but when it does, it may appear as erythematous-violaceous plaques or nodules, often associated with mediastinal masses .
Classification and Diagnostic Considerations
Cutaneous manifestations are classified as specific (direct infiltration by lymphoma cells) or non-specific (paraneoplastic or reactive changes). Accurate diagnosis requires clinicopathological correlation, including histology, immunophenotyping, and sometimes molecular studies. Differentiating between primary and secondary cutaneous lymphomas is crucial for appropriate management Sander2001Carlesimo2014Zanardi2025.
Prognostic and Therapeutic Implications
The type and extent of cutaneous involvement can influence prognosis and guide therapy. For example, indolent primary cutaneous lymphomas may be managed with skin-directed therapies, while aggressive or secondary cutaneous lymphomas often require systemic treatment. Novel targeted therapies and immunotherapies are emerging, especially for refractory or advanced cases Rubio-Gonzalez2017Dummer2021Kempf2021+1 MORE.
Conclusion
Cutaneous manifestations of lymphoma are varied and can provide important clues for diagnosis, prognosis, and disease monitoring. Recognizing the specific patterns of skin involvement and understanding their clinical significance is essential for timely and effective management of lymphoma patients Sander2001Rubio-Gonzalez2017Carlesimo2014+5 MORE.
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