If the lymphoma is causing no symptoms, it may not be necessary to give treatment immediately. You will be seen regularly by your cancer specialist or GP, and treatment will be advised when you start to get symptoms. It may be some time before this happens, and some patients may never need any treatment.
Radiotherapy
Radiotherapy is the use of high-energy rays to destroy cancer cells, while doing as little harm as possible to the healthy cells. It may be used when the lymphoma cells are contained in one or two groups of lymph nodes in the same part of the body (Stage 1 or 2). Treatment of early-stage follicular lymphoma may lead to a cure in some people. Radiotherapy may also be given with chemotherapy.
Chemotherapy
Chemotherapy is the use of anti-cancer (cytotoxic) drugs to destroy cancer cells. It may be given if the lymphoma has spread to several groups of lymph nodes and/or other organs. Follicular lymphoma is very sensitive to chemotherapy and often disappears with this treatment.
Chemotherapy is frequently given in the form of tablets, using a drug called chlorambucil (pronounced claw-ram-bu-cil), which may be combined with steroids. A drug called fludarabine (flu dar a been), that is injected into a vein, may also be used, either alone or in combination with other drugs.
A commonly used regimen of chemotherapy drugs for follicular lymphoma is R-CVP. This includes the monoclonal antibody rituximab (Mabthera®), the chemotherapy drugs cyclophosphamide (sigh clo fos fa mide) and vincristine (vin chris teen), and the steroid prednisolone (pred ni so lone).
Although follicular lymphoma usually responds well to chemotherapy, there is a risk that it may come back in future years. However, further chemotherapy can then be given and control the lymphoma again. This pattern may repeat itself over many years.
In some people, follicular lymphoma may become resistant to chemotherapy and in others it may change (transform) into a high-grade non-Hodgkin lymphoma, usually a type known as diffuse large B-cell.
High-dose treatment with stem cell support
High-dose chemotherapy with bone marrow or stem cell infusions has been used for some patients. This type of treatment involves very intensive chemotherapy, and sometimes radiotherapy.
As the side effects can be severe, some types of high-dose treatment are not given to people over the age of 45–50, while others can be given to people of up to 65 years who are fit enough to have it. The intensity of the treatment increases the risks of serious side effects for people over these ages.
Steroid therapy
Steroids are drugs which are often given with chemotherapy to help treat lymphomas. They also help you feel better and can reduce feelings of sickness.
Interferon
Interferon (in ter fear ron) is a protein that occurs naturally in the body. It is sometimes used to boost the body’s immune system to control the lymphoma. Interferon is given as an injection just under the skin (subcutaneously).
Monoclonal antibody therapy
Monoclonal antibodies are drugs that recognise, target, and stick to specific proteins on the surface of cancer cells, and can stimulate the body’s immune system to destroy these cells. Rituximab (Mabthera®) is a monoclonal antibody that is commonly used to treat follicular lymphoma. It is usually given with chemotherapy as part of a regime called R-CVP (see above).
More types of monoclonal antibodies are being researched. Some are attached to low doses of radioactivity to see whether this will make them more effective in treating the lymphoma. The most commonly used radioactive monoclonal antibodies are 90Y-ibritumomab tiuxetan (Zevalin®) and Iodine131 tositumomab (Bexxar®).