In the case of the most localized tumors, surgery is the main treatment and is often the first step. The goal is to remove the cancer-infected tissue as completely as possible. Surgeon refer to adjacent, healthy tissue, could it be that tumor cells are penetrated, and also associated lymph nodes because metastases are often first. The Doctors are as gentle as possible and try to get the affected Organ and its function to a large extent. Not always, it takes an open Operation, sometimes, a minimally invasive procedure, known as key hole surgery, such as tumors in the stomach and intestines, or in the case of cervical cancer. The doctor then puts only a small incision, surgical devices, as well as a small camera in the body can introduce.