1. The diagnosis of lymphoma depends on pathology, mostly lymph node biopsy, sometimes spleen excision and thoracoscopy are required, and gastrointestinal lymphoma is sometimes diagnosed by endoscopy or pathology of specimens obtained during surgery. 2. Immunohistochemical examination and sometimes flow cytometry of bone marrow cells should be performed to help determine the diagnosis. Sometimes genetic testing and chromosomal testing are also required. 3. The early examination should be as complete as possible, so that the treatment plan can be chosen and the prognosis can be determined. So sometimes it costs a lot of money before treatment is even started. But it is really worth it, not to fight an unprepared battle! 4. Treatment options may be different for different patients due to different types of pathology. For example, some are CD20 negative, so you can’t use Meroval. Some have large masses before treatment, and they need to add radiotherapy locally. Some are highly malignant and need to be actively prepared for stem cell transplantation.