Question: Can you identify this condition?

A 54-year-old woman presents with a nontender pink nodule with a central keratin plug on her right elbow. The lesion evolved to its current size over a period of 3 weeks and the patient denies a recent history of trauma to the site. She is afebrile, takes no medications, and her medical history is unremarkable.

The most likely diagnosis is

1. Squamous cell carcinoma

2. Pyogenic granuloma

3. Cutaneous horn

4. Keratoacanthoma

5. Basal cell carcinoma

Answer on page 993

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