A 35-year-old farmer is seen at your office for a rapidly growing nodule on his right upper lip near the vermilion margin. This was first noticed 4 weeks ago. He is concerned about the character and potential of this lesion. Physical examination of the involved region reveals a lesion suggesting a keratoacanthoma (KA).
1. What are the primary lesions that you would expect to find in keratoacanthoma?
2. What are the secondary lesions that you would expect to find in keratoacanthoma?
3. Keratoacanthoma is most commonly mistaken for what other condition?
4. What should you tell the patient about keratoacanthoma?
5. Should you treat keratoacanthoma in this patient, and if so, how?
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