Cancer surgery is a branch of oncology that focuses on the surgical removal of cancerous tumors and tissues from the body. It is often used as a primary treatment for solid tumor cancers, such as breast cancer, lung cancer, and prostate cancer. The goal of cancer surgery is to remove as much of the tumor as possible while preserving healthy surrounding tissues and organs. In some cases, surgery may be combined with other treatments, such as chemotherapy or radiation therapy, to improve outcomes. Advances in surgical techniques, including minimally invasive procedures and robotic surgery, have improved outcomes and reduced the recovery time for many cancer patients.