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Cavum septi pellucidi (CSP) is a developmental anomaly, and its pathological significance is unknown. The CSP and other ventricles communicate with each other, and CSF enters the CSP from the third and lateral ventricles, in which CSF is produced. In this report a rare case of an abscess formed in the CSP is presented.
A 21 year old woman was admitted to the hospital because of fever, vomiting, headache, and confusion. Her temperature was 38°C. Neurological evaluation showed that she was in a state of confusion. Her neck was stiff, and Kernig and Lasegue signs were positive. A lumbar puncture yielded white cloudy CSF. The CSF contained 900 white cells/mm3, of which 85% were neutrophils; the glucose concentration was 20 mg/100 ml and the protein concentration was …