Plastic surgery is a surgical sub-specialty that deals with the healing and restoration of form and function in the human body. Derived from the Greek word "plastikos" (meaning "to mold or to shape"), plastic surgeons are masters of anatomy with the ability to operate on any part of the body. The specialty has evolved to include aesthetic or cosmetic surgery, which specifically addresses rejuvenation and the restoration of a youthful appearance. This is in addition to the traditional reconstructive role a plastic surgeon plays in repairing injury, disfigurement, and scarring from trauma, disease, congenital defects, or cancer.