Lymphoma is considered to be a clonal malignant tumor derived from lymphocytes, while lymphocytes are divided into B lymphocytes, T lymphocytes, and NK cells, and different lymphocytes are divided into mature and immature ones according to different developmental stages, so there are many kinds of lymphomas. The prognosis of different lymphomas is completely different, some lymphomas can survive for a long time without treatment, while some lymphomas progress quickly and die within a few weeks without treatment.