Follicular lymphoma is a type of non-Hodgkin lymphoma that affects the body's lymphatic system. There are several synonyms for follicular lymphoma, including nodular lymphoma, grade 1-2 follicular lymphoma, and low-grade B-cell lymphoma. Other types of B-cell non-Hodgkin lymphomas that can be confused with follicular lymphoma include mantle cell lymphoma, lymphoplasmacytic lymphoma, and diffuse large B-cell lymphoma. A correct diagnosis of follicular lymphoma is important for determining the best course of treatment. This may include radiation therapy, chemotherapy, or immunotherapy, depending on the grade and stage of the cancer. With proper treatment, many individuals with follicular lymphoma can achieve long-term remission.