The exact length of time it takes to go from Stage I to Stage IV lymphoma is related to the type of tumor, the patient’s own ability to compensate, and whether or not he or she has had standardized treatment. Generally speaking, it may take ten years or even more for inert lymphoma to go from Stage I to Stage IV. In the case of aggressive lymphoma, it only takes about six months to a year. Lymphoma is a kind of malignant tumor, stage I generally refers to the early stage. If the patient is in good condition and cooperates with the doctor to take effective treatment at an early stage, the development of the disease will be slower, and the development from stage I to stage IV may take a few years, or even may take about ten years. If aggressive lymphoma is not treated in time, the patient may develop to stage IV in about half a year to a year, or even develop into advanced lymphoma in 3 to 6 months. Once lymphoma is diagnosed, patients should actively cooperate with doctors to take treatment, which can slow down the progression of the disease, and generally the earlier the treatment, the better the prognosis.