Discoid Lupus Erythematosus

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  • Discoid
    • Milder variant of systemic
    • Depigmentation, erythema, scaling, erosions, ulceration, crusting
    • Usually involves nasal planum, dorsum of muzzle, occasionally pinnae, lips, oral mucosa or periocular area
    • Microscopically: lichenoid interface dermatitis, often with lymphocytes, plasma cells, basal cell degeneration, loss of pigment