Lymphoma is mainly a disease of the blood system, so you can choose the hematology department if you seek treatment. The hematology department can make a comprehensive and accurate diagnosis and stage of lymphoma, and then make a comprehensive or accurate treatment. If radiotherapy is needed, you can go to the oncology department. Therefore, in order to make a clear diagnosis, lymphoma can be firstly diagnosed in hematology, so that hematologists can judge the specific pathological nature and stage and formulate a treatment plan. Therefore, lymphoma should be seen in the hematology department first, and then in the oncology department according to the efficacy.