Lichen planus

external

• Causes

  • Graft versus host disease
  • Gold
  • Penicillamine
  • Antimalarial drug
  • Sulphonylurea
  • Beta adrenoceptor blocker
  • Thiazide
  • Methyldopa
  • Dye
  • Hepatitis B
  • Hepatitis C

• Effects

  • Pruritic papules
  • Scarring alopecia
  • Skin irritation
  • Oral ulcer
  • Koebner phenomenon
  • Wickham striae
  • Trachonychia
  • Nail dystrophy
  • Nail pitting
  • Pterygium of the nail
  • White oral plaque

• Parents

  • Vulval skin disorder
  • Disorder of keratinsation

• Treatments

  • Triamcinolone
  • Cyclosporin
  • Isotretinoin
  • Psoralen and ultraviolet-A light
  • Glucocorticoid

• Description

  • "Commonly idiopathic / autoimmune Usually asymptomatic Pink-red polygonal papules Wrist
  • palm
  • soles
  • genitals
  • buccal mucosa (75%
  • white lacy plaque)
  • shin
  • ankle Rx steroids"