Vitiligo with inflammatory raised borders, associated with atopic dermatitis

Area of Science:

• Immunodermatology
• T cell immunology
• Autoimmune skin diseases

Background:

• Atopic dermatitis is typically associated with a T helper 2 (Th2) dominant immune response.
• Vitiligo is an autoimmune condition characterized by depigmentation of the skin.
• Inflammatory raised borders in vitiligo suggest an active immune process.

Observation:

• A patient with childhood atopic dermatitis developed vitiligo with inflammatory raised borders.
• Immunohistochemistry revealed CD4+ T cells within the vitiligo border and CD8+ T cells adjacent to it.
• Peripheral blood analysis showed an increased percentage of CXCR3+ CD4+ Th1 cells, unlike a typical Th2-dominant atopic dermatitis patient.

Findings:

• The findings suggest CD8+ T cells may precede CD4+ T cell infiltration in vitiligo borders.
• The case demonstrates a Th1-dominant immune profile in a patient with co-existing atopic dermatitis and vitiligo.
• This indicates a potential shift from a Th2-dominant state to a Th1-dominant state.

Implications:

• Vitiligo with inflammatory features can manifest in atopic dermatitis patients under specific immune conditions.
• Activated Th1 cells may play a crucial role in the pathogenesis of vitiligo, even in the context of atopy.
• This case expands our understanding of the complex interplay between atopic dermatitis and autoimmune skin conditions like vitiligo.