Acral Lick Dermatitis

• Also called lick granuloma or neurodermatitis
• Mostly occurs in dogs due to constant licking or chewing
• Areas most affected are carpal, metacarpal, metatarsal, radial or tibial areas
• Usually a single lesion
• Grossly:
  • Circumscribed hairless areas that may ulcerate
• Microscopically:
  • Compact hyperkeratosis
  • Hyperplasia of follicular and epidermal epithelium and sebaceous glands
  • Collagenous fibres causing dermal thickening
  • Perivascular and periadnexal plasma cell accumulation
  • May be associated with mild snsory polyneuropathy