Recurrent fever of unknown origin, coma, and meningismus due to a leaking craniopharyngioma

A cyclic leaking craniopharyngioma was found to be the source of recurrent fevers, meningismus, and coma. A sterile persistent neutrophilic pleocytosis with normal glucose and protein was the only clue in an extensive workup. Three head computed tomographic scans, including double contrast with 5-mm cuts, failed to locate the large suprasellar cyst outlined finally by head computed tomographic scan with metrizamide. A handful of case reports exist about leaking central nervous system cysts, but their presentation tended to be different: increased protein, lymphocytosis, and positive cranial imaging. It is believed this is a unique case that adds to the spectrum of chronic neutrophilic meningitis.