Follicular lymphoma requires immunohistochemical testing, which can clarify the specific classification and thus guide treatment. Lymphoma belongs to the more common malignant tumors in the clinic, and its diagnosis is mainly through immunohistochemistry examination of pathological examination, through immunohistochemistry test can further more accurate classification of lymphoma, guide the diagnosis as well as the choice of patients’ treatment plan. Therefore, follicular lymphoma requires immunohistochemical testing. In addition to immunohistochemistry testing, genetic testing can also be used to clarify whether the patient is sensitive to targeted and immune therapies, which can further evaluate the choice of treatment and prognosis of the patient. It is recommended that patients actively improve the relevant examinations to determine the follow-up treatment plan, and actively treat the disease to avoid delays.