Choriomeningitis is a medical condition that affects the brain and nervous system. The term is derived from two words, chorion and meningitis, which refer to the membrane that surrounds the fetus and inflammation of the meninges respectively. Synonyms for choriomeningitis include lymphocytic choriomeningitis virus (LCMV), aseptic meningitis, meningoencephalitis, and viral meningitis. These conditions share similar symptoms such as fever, headache, stiffness in the neck, and vomiting. However, each condition has distinct characteristics and may require different treatments. It is important to seek medical attention when experiencing any of these symptoms to determine the underlying cause and receive appropriate treatment.