Question: Can you identify this condition?

A 13-year-old girl presents with a 9-month history of hyperpigmentation of her elbows, neck, chin, and axillae. She is otherwise healthy and takes no medications. Her family history is noncontributory.

The most likely diagnosis is

1. Acanthosis nigricans

2. Erythrasma

3. Intertrigo

4. Postinflammatory hyperpigmentation

Answer on page 1081

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