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Meningitis marked by persistent fever, headache, and stiff neck (associated, on lumbar puncture, with cerebrospinal fluid pleocytosis and elevated spinal fluid pressure). The underlying cause of this cluster of findings may be initially difficult to determine. Syphilis, cryptococcosis, HIV infection, or invasion of the meninges by cancer cells may be responsible. Occasionally, repeated lumbar punctures reveal a vasculitis of the central nervous system or a partially treated bacterial meningitis.
See also: meningitis