Meningitis, whether acute or chronic, is by definition an inflammation of the meninges. This can be due to both infectious or non-infectious reasons. DIAM is a noninfectious meningitis that is associated with the use of certain medications listed above. The pathogenesis of DIAM is poorly understood and may be related to autoimmune hypersensitivity reactions, although it may vary depending on the inciting medication. For instance, DIAM caused by OKT3 antibodies may be mediated by cytokine release rather than hypersensitivity reactions. There is an association with certain underlying conditions such as Systemic Lupus Erythematosus (SLE), and other underlying conditions that were present in a small amount of patients included Sjögren syndrome, Idiopathic thrombocytopenic purpura, rheumatoid arthritis, HIV, Crohn's disease.
Drug-induced aseptic meningitis
Fungal meningitis
Aseptic meningitis
Viral meningitis
Herpesviral meningitis
Viral encephalitis
Tuberculous meningitis
Granulomatous meningoencephalitis