Emergency and Acute Dermatology

Question 1

What are common causes os psoriasiform rash?

Answer 1

• Lithium
• Beta-blockers

Question 2

What is urticaria and how is it treated?

Answer 2

• Itchy, wheals
• Immune mediated type I allergic IgE response
• Non-immune mediated direct mast cell degranulation (e.g. antibiotics, opiates, NSAIDs and contrast media)
• Treat with antihistamines, steroids and immunosuppression

Question 3

What’s the difference between pemphigoid and pemphigus?

Answer 3

• Antibodies to various skin components
• Pemphigoid is full thickness depth of the skin (remember pehmhigoiD)
• Pemphigus is superfiscial (remember PemphiguS)

Question 4

What is dermatitis herpitiformis associated with?

Answer 4

• Coeliac disease

Question 5

What are toxic epidermal necrolysis (TEN) and Steven Johnson Syndrome (SJS)?

Answer 5

• Disease spectrum SJS->TEN
• If <10% of skin involvement then SJS
• Most severe mucous membrane involvement

Question 6

What is erythema multiforme associated with?

Answer 6

• Target lesions (at least 3 ring components)
• Associated with HSV and EBV