Follicular lymphoma grade 3a is an intermediate to advanced lymphoma that may progress to diffuse large b lymphoma and treatment is aggressively sought. Follicular lymphoma consists of a variable proportion of centrocytes and centroblasts. It is divided into three grades based on the number of mother cells, with grade III containing a and b within it. Grades I and II are in the low-risk category, while grade III is in the high-risk category. Grades I and II are generally inert lymphomas and can be treated with watchful waiting. Early stage, even if untreated, has a long survival period, while progressive stage can be treated with radiotherapy combined with chemotherapy, which can effectively alleviate the condition, but is generally not curable, and may progress further or relapse. If the diagnosis of follicular lymphoma grade 3a is confirmed, it is recommended to go to the hospital in time for standardized treatment under the guidance of the doctor.