General Surgery is a subfield of Surgery which deals with surgical treatment of abdominal or-gans like esophagus, stomach, intestines, liver, colon, appendix, bile ducts, rectum and very often, thyroid gland. Procedures can range from a simple surgery such as an appendectomy, to the more delicate and complex liver resection. Breast surgery and skin grafting for burns or injury is also classified as General Surgery, though a Plastic surgeon may also be included to enhance appearance and ability to function.