(BMJ)—A 16-wk-old, preterm infant presented w/ a 6-wk hx of erythema and crusting over the lips, nose, and small joints of her hands and feet. She was breastfed and had normal development. Viral and bacterial swabs were negative. An oral supplement cleared the rash in 48 h. What is the diagnosis?
Zinc deficiency
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Seborrheic dermatitis
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Contact dermatitis
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Scurvy
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Vitamin B12 deficiency
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