A primary CNS lymphoma is a rare type of lymphoma (cancer of the lymphatic system) that starts in the central nervous system (CNS).
This information describes primary CNS lymphomas, their symptoms, tests, and possible treatments. It should ideally be read with our general information about brain tumours and non-Hodgkin lymphoma which go into more detail about tests, treatments and their side effects. We also have information on spinal cord tumours.
We hope this information answers your questions. If you have any further questions, you can ask your doctor or nurse at the hospital where you are having treatment.