Dermatitis herpetiformis

• History / PE:
  Erythematous vesicles symmetrically distributed over the extensor surfaces of elbows and knees
  Diarrhea and weight loss
• Diagnosis:
  Skin has IgA deposits (even in unaffected areas)
  Anti-endomysial / anti-transglutaminase antibodies
• Treatment:
  Gluten free diet
  Dapsone
• Associated With:
  Celiac disease