Surgery is a traditional form of cancer treatment. It is the most effective in eliminating most types of cancer before it has spread to lymph nodes or distant sites (metastasized). Surgery may be used alone or in combination with other treatments, such as radiation therapy Radiation Therapy for Cancer Radiation is a form of intense energy generated by a radioactive substance, such as cobalt, or by specialized equipment, such as an atomic particle (linear) accelerator. Radiation preferentially... read more and chemotherapy Chemotherapy and Other Systemic Cancer Treatments Systemic treatments are those that have effects throughout the body rather than being applied directly to the cancer. Chemotherapy is a form of systemic treatment that uses drugs to kill cancer... read more (see also Cancer Treatment Principles Cancer Treatment Principles Treating cancer is one of the most complex aspects of medical care. It involves a team that encompasses many types of doctors working together (for example, primary care doctors, gynecologists... read more ). Doctors may give these other treatments:
Before surgery (neoadjuvant therapy) to reduce the size of the tumor before surgery
After surgery (adjuvant therapy) to ensure that as many cancer cells as possible are eliminated
If the cancer has not metastasized, surgery may cure the person. However, it is not always possible to be sure before surgery whether the cancer has or has not spread. During surgery, doctors often remove lymph nodes Overview of the Lymphatic System The lymphatic system is a vital part of the immune system. It includes organs such as the thymus, bone marrow, spleen, tonsils, appendix, and Peyer patches in the small intestine that produce... read more near the tumor (sentinel nodes) to see whether the cancer has spread to them. If so, the person may be at a high risk of having the cancer recur and may need chemotherapy or radiation therapy after surgery to prevent a recurrence.
Surgery is not the preferred treatment for all early-stage cancers. Some cancers grow in inaccessible sites. In other instances, removing the cancer might require removing a necessary organ, or surgery might impair the organ's function. In such cases, radiation treatment Radiation Therapy for Cancer Radiation is a form of intense energy generated by a radioactive substance, such as cobalt, or by specialized equipment, such as an atomic particle (linear) accelerator. Radiation preferentially... read more with or without chemotherapy Chemotherapy and Other Systemic Cancer Treatments Systemic treatments are those that have effects throughout the body rather than being applied directly to the cancer. Chemotherapy is a form of systemic treatment that uses drugs to kill cancer... read more may be preferable.
Surgery is not the main treatment once a cancer has metastasized. However, surgery is sometimes used to reduce primary tumor size (a procedure called debulking), so that radiation therapy and chemotherapy may be more effective. Or surgery may be done to relieve symptoms, such as the severe pain or nausea or vomiting caused when a tumor blocks (obstructs) the intestine. Surgically removing metastases rarely results in a cure because finding all the tumors is difficult. Tumors that remain usually continue to grow. However, in certain cancers (such as renal cell cancer) that have a very small number of metastases, particularly to the liver, brain, or lungs, surgical removal of the metastases can be beneficial.
After a tumor has been removed, additional surgery may be needed to improve the person's comfort or quality of life (for example, reconstruction of a breast after mastectomy).
