NHL Radiation Therapy
The role of radiotherapyotherwise known as radiation therapyfor the treatment of non-Hodgkin's lymphoma (NHL) depends on the type and stage of disease, as well as the health status of the patient. With new improvements in chemotherapy, radiotherapy has been modified or even eliminated for some types of lymphoma. The exceptions are early-stage low-grade lymphomas, which often can be treated by radiotherapy alone, as well as lymphomas of certain organs, such as the eye.
Radiotherapy uses high-energy, ionizing radiation (e.g., gamma rays) to kill cancer cells. Radiotherapy can be delivered in many ways: (1) by a radiotherapy device, which is used outside of the body, "external beam radiation," in a manner similar to that of an x-ray machine; (2) by injection of a short-lived radioactive chemical such as radioactive phosphorus (32P) into the body; or (3) implantation (surgical placement) of radioactive material in or near a tumor, called "implant radiation."
External beam radiation often is applied to the mantle field - the area including the neck, chest, and underarm lymph nodesfor cases of high-neck or upper torso disease. For disease below the diaphragm, the pelvic lymph nodes and spleen may be targeted. Radiotherapy must reach all cancer cells within the radiation field to be effective. Abdominal organs like the ovaries, liver, kidneys, and small bowel may not be able to withstand the doses of radiation required to destroy all cancerous tissue, and they may need to be shielded during radiotherapy. The ovaries, in particular, actually may be moved surgically ("oophoropexy") to allow their shielding with a full-thickness block. This helps to maintain menstrual function and fertility in many women.
Total Nodal Irradiation TLI
Total nodal irradiation, otherwise known as total lymphoid radiation (TLI), involves the irradiation of all lymphatic tissues within the upper and lower body. This approach may be used for individuals with widespread, late-stage disease, but it is not recommended for patients with early-stage, slow-growing lymphomas.
Total Body Irradiation (TBI)
Total body irradiation (TBI) often is used to prepare patients for a treatment plan of high-dose chemotherapy with stem cell transplantation. Such radiation therapy creates space in the bone marrow for transplanted cells to expand, suppresses immune system rejection of the graft, and helps to eliminate any remaining cancer cells.
Many advances are being made in the treatment of NHL. However, continued advances in the field depend upon the participation of patients in clinical trials. Through the use of clinical trials improved treatment outcomes and the development of more risk appropriate strategies can be secured. It is possible participation in a clinical trial may help you and the next unfortunate individual who will be diagnosed in the future. Please consider any clinical trial, which your physician may discuss with you. If clinical trial participation is not discussed, please ask your physician if there any trials for which you may be eligible for participation.