Surgery is the actual physical removal and/or treatment of cancerous tissue by making incisions in the body. Surgery is the oldest and often the most effective form of cancer treatment for solid tumors, but it is also the most invasive with a high level of risk. Surgery is sometimes used in conjunction with chemotherapy and/or radiation therapy in the more complex gastrointestinal cancer cases.

You can find more information about surgery and other treatment options at the American Cancer Society's Web Site.