Emergency derm

Question 1

Erythema nodosum

• causes
• presentation

Answer 1

causes: group A strep, pregnancy, malignancy, sarcoidosis, IBD, chlamydia
presentation: discrete tender nodules usually on the shins which bruise as they resolve

Question 2

main precipitating factor of erythema multiforme

Answer 2

herpes simplex virus

Question 3

Stevens Johnson syndrome

• characteristics
• main associations (causes)

Answer 3

• mucocutaneous necrosis of atleast two mucosal sites

- mainly drug eruptions can be due to infections

Question 4

Toxic epidermal necrosis

• causes
• characteristics
• histopathology

Answer 4

• drug- eruptions
• extensive skin and mucosal necrosis and SYSTEMIC sx
• full thickness epidermal necrosis with subepidermal detachment

Question 5

Managment of drug eruptions

Answer 5

• full supportive care

- stop causative drug

Question 6

Meningitis

• describe the rash
• management

Answer 6

• non- blanching purpuric rash on trunk and extremities

- benzylpenicillin

Question 7

Erythroderma

• define
• causes
• management
• complications

Answer 7

• exfoliative dermatitis involving >90% of the skin
• previous skin disease (eczema, psoriasis), lymphoma, drugs (sulphonlyureas, penicillin, allopurinol)
• treat underlying cause, emollients and wet wraps, topical steroids to relieve inflammation
• fluid loss and electrolyte imbalance