What is follicular lymphoma?

Follicular lymphoma is a cancer of the immune system.

Follicular lymphoma is a type of non-Hodgkin lymphoma, one of the most common forms of blood cancer. Non-Hodgkin lymphoma can be either fast growing (aggressive) or slow growing (indolent).

Follicular lymphoma is the most common slow-growing type and occurs in lymphocytes, a type of white blood cell. These cells are an important part of your immune system and help defend your body from infection.

When you have follicular lymphoma, too many white blood cells that are affected by the disease build up in your lymph nodes, blood, and bone marrow. They may also build up in your spleen (an organ in your immune system) and cause swelling of this organ.