Which feature is most characteristic of keratoacanthoma?

Which feature is most characteristic of keratoacanthoma?

• A. Rapid growth on the face with a central crater
• B. Slow-growing lesion on the scalp
• C. Painful ulcer on the distal extremities
• D. Lesion on the trunk with a scaly plaque

Answer: (A)

Rapid growth on sun-exposed facial skin with a central keratin-filled crater is the hallmark of keratoacanthoma. These lesions appear as dome-shaped, flesh-colored nodules that develop quickly over weeks and often show a central plug of keratin, forming a crater-like center. This combination of brisk growth and a central crater on the face helps distinguish it from other skin lesions, which tend to grow more slowly or present with ulcers or plaques in different locations.

Rapid growth on sun-exposed facial skin with a central keratin-filled crater is the hallmark of keratoacanthoma. These lesions appear as dome-shaped, flesh-colored nodules that develop quickly over weeks and often show a central plug of keratin, forming a crater-like center. This combination of brisk growth and a central crater on the face helps distinguish it from other skin lesions, which tend to grow more slowly or present with ulcers or plaques in different locations.