What is a characteristic appearance of seborrheic keratosis?

Seborrheic keratosis is known for its distinct appearance, which is often described as having a waxy or "pasted on" look. This characteristic arises from the accumulation of keratinocytes that form a surface layer that appears raised and may vary in color from light tan to dark brown. The texture can be somewhat uneven but typically lacks a scaly surface, which differentiates it from other skin lesions.

The "pasted on" look reflects how these lesions typically sit atop the skin and may have a slightly elevated or irregular surface. This appearance is crucial for identifying seborrheic keratosis in a clinical setting and helps healthcare providers differentiate it from other types of skin lesions or conditions.