A skin growth that is caused by an overproduction of the strong fibrous protein keratin. Keratosis arises usually in elderly people.
Seborrhoeic keratosis are harmless growths that arise mostly on the trunk. They vary in appearance from dark-brown, flat patches to little, wartlike protrusions. The growths do not need treating unless they are very unappealing to the eye.
Solar keratosis are small, wartlike, flesh-coloured or red growths that appear on exposed parts of the body as a result of excessive exposure to the sun over a number of years. Hardly ever, they can turn into skin cancer, generally squamous cell carcinoma.
Seborrheic keratosis can be got rid of by curettage (scraping away). However, surgery is needed for solar keratosis that have become cancerous.