A soft, round, wart-like fleshy growth on the trunk or back, ranging in color from light tan to black, appearing pasted on the skin. Most likely diagnosis?

• A. Actinic Keratosis
• B. Seborrheic Keratosis
• C. Verruca Vulgaris
• D. Dermatofibroma

Answer: (B)

Seborrheic keratosis. This lesion is typically a soft, round, waxy or “stuck-on” plaque that sits on the skin, often on the trunk, and ranges in color from light tan to dark brown or black. The key clue is the pasted-on, pigmented, verrucous appearance that is classic for SK and helps distinguish it from other growths. Actinic keratosis usually appears as a rough, scaly patch on sun-exposed skin; verruca vulgaris (warts) are more keratotic and irregular with a papillomatous surface, often on the hands or feet; dermatofibroma is a firm, dome-shaped nodule rather than a soft, fleshy, wart-like lesion.