The main signs of this condition are headache and vomiting.
Causes and Risk Factors
It is not yet known what causes this disease.
Several factors, however, may put a person at higher risk of developing this condition:
- Being infected with certain viruses, including the Epstein-Barr virus (which causes mononucleosis) and HIV
- Having a compromised immune system, including persons with AIDS or who have had an organ transplant and are taking drugs that suppress the immune system
- Exposure to chemicals such as pesticides, solvents or fertilizers
- Having a family history of individuals who have had non-Hodgkin's lymphoma