TBM causes inflammation of the meninges, which are the thin membranes surrounding the brain and spinal cord. This condition may result in symptoms such as headache and neurological issues.

Without treatment, the condition may result in a coma or be fatal.

This article describes the cause of TBM and its risk factors, signs, and symptoms. We also provide information on how doctors diagnose and treat TBM and the outlook for people living with the condition.