B6. Lichen planus

• Chronic inflammatory disease of unknown etiology
• Associated with hep C
• Cutaneous lichen planus
  • 5 P’s
    • Purple
    • Planar
    • Pruritic
    • Polygonal
    • Papules
  • Wickham striae – characteristic white lines
• Mucosal lichen planus
  • Wickham striae in oral cavity
  • Painful, erosive lesions in oral cavity
  • Can also affect oesophagus
• Genital lichen planus
  • Papules on genital organs
• Treatment
  • Topical/oral steroids
  • Phototherapy