Infant was brought in for a widespread rash. Let’s diagnose.

A 22-month-old boy was brought to the doctor by his father for a widespread rash that developed over the prior few weeks. The patient’s father mentioned that his son frequently scratched the lesions. On examination, many scattered reddish-brown macules and papules were seen on the boy’s trunk and arms. Darier sign was positive.

What’s the diagnosis?

Use the Differential Builder in VisualDx to help you.

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