<unk>  is the inflammation of the protective membranes covering the central nervous system, known collectively as the meninges (the leptomeninges and underlying subarachnoid cerebrospinal fluid).<unk>  may develop in response to a number of causes, including infectious agents (bacteria, viruses, fungi, or other organisms), physical injury, cancer, or certain drugs. While some forms of<unk>  are mild and resolve on their own,<unk>  is a potentially serious condition owing to the proximity of the inflammation to the brain and spinal cord. The potential for serious neurologic damage or even death necessitates prompt medical attention and evaluation. Infectious<unk> , the most common form, is typically treated with antibiotics and close observation.
Meningitis
Cerebritis
Encephalitis
Meningoencephalitis
Meninges
Meningism
Neoplastic meningitis
Lymphocytic choriomeningitis