A harmless skin growth seen in adults.

Seborrheic keratoses are harmless common skin growths that first appear during adult life. Some people have inherited a tendency to develop a very large number of them. They begin as slightly raised, light brown spots most often on the trunk. Gradually they thicken and take on a rough, warty surface which makes them appear darker and may turn black. Seborrheic keratoses are superficial and look as if they were stuck on the skin.