Follicular lymphoma is a cancer that affects white blood cells called lymphocytes. They help your body fight infections.
There are two types of lymphomas: Hodgkin's and non-Hodgkin's, based on the kind of white blood cell they affect. Follicular lymphoma is a non-Hodgkin's lymphoma.
When you have follicular lymphoma, the sick blood cells can travel to many parts of your body, such as your organs, bone marrow, and lymph nodes (pea-sized glands in your neck, groin, and under your arms that are...
Follicular lymphoma comprises 20% of all NHLs and as many as 70% of the indolent lymphomas reported in American and European clinical trials.[1,2,3] Most patients with follicular lymphoma are age 50 years and older and present with widespread disease at diagnosis. Nodal involvement is most common and is often accompanied by splenic and bone marrow disease. Rearrangement of the bcl-2 gene is present in more than 90% of patients with follicular lymphoma; overexpression of the bcl-2 protein is associated with the inability to eradicate the lymphoma by inhibiting apoptosis.
Despite the advanced stage, the median survival ranges from 8 to 15 years, leading to the designation of being indolent.[5,6,7] Patients with advanced-stage follicular lymphoma are not cured with current therapeutic options. The rate of relapse is fairly consistent over time, even in patients who have achieved complete responses to treatment. Watchful waiting, i.e., the deferring of treatment until the patient becomes symptomatic, is an option for patients with advanced-stage follicular lymphoma. An international index for follicular lymphoma (i.e., the Follicular Lymphoma International Prognostic Index [FLIPI]) [11,12,13] identified five significant risk factors prognostic of overall survival (OS):
Age (≤60 years vs. >60 years).
Serum lactate dehydrogenase (LDH) (normal vs. elevated).
Stage (stage I or stage II vs. stage III or stage IV).
Patients with none or one risk factor have an 85% 10-year survival rate, while three or more risk factors confer a 40% 10-year survival rate. As a revised FLIPI, an elevated beta-2-microglobulin and lymph node size of more than 6 cm are proposed prognostic factors instead of serum LDH and the number of nodal areas. Gene expression profiles of tumor biopsy specimens suggest that follicular lymphoma that is surrounded by infiltrating T-lymphocytes has a much longer median survival (13.6 years) than follicular lymphoma that is surrounded by dendritic and monocytic cells (3.9 years) (P < .001).