A 14yo girl has developed an itchy, scaly patch on her scalp. She had a similar patch that cleared
spontaneously 2yrs ago. Her aunt has a similar undiagnosed rash on the extensor aspects of her
elbows and knees. What is the single most likely dx?
a. Eczema
b. Fungal infection
c. Impetigo
d. Lichen planus
e. Psoriasis
answer: E
Psoriasis : Plaques red silvery scales
distribution: extensor surfaces, palms, soles, scalp, sacral area
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