The dermis, the skin's next layer, is a thick layer of fibrous and elastic tissue (made mostly of collagen, with a small but important component of elastin) that gives the skin its flexibility and strength. The dermis contains nerve endings, sweat glands and oil (sebaceous) glands, hair follicles, and blood vessels.
âAll cancers are caused by genetic mutations, and in some cases we know the processes driving them, for example, tobacco smoking in lung cancer, however, our understanding of the causes of mutation in most cancers is remarkably limited,â Grimmond says.
Prostate Cancer The causes of prostate cancer are unknown, but some risk factors that have been identified are: 1  race â Black American men have a much higher rate of prostate cancer than White American men. 2  family history. 3  history of sexually transmitted disease. 4  older age. 5  diet high in animal fats.