Discoid Lupus Erythematosus

• 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