What is seborrheic keratosis?

Seborrheic keratosis is a very common harmless, usually pigmented, noncancerous growth on the skin. It usually appears as a pale, black or brown growth on the back, shoulders chest or face, but can appear anywhere on the skin. The plural of keratosis is keratoses. Seborrheic keratoses are also known as basal cell papillomas or seborrheic warts. The American Academy of Dermatology says that although seborrheic keratosis may look worrisome, it is benign - not a cancer. They tend to appear from middle-age onwards...