“…[20,21,22] Focal deficits such as hemiparesis and hemisensory disturbance, seizures, impairment of level of consciousness and papilloedema occur in onethird to three-quarters of cases. [20,22] The onset may be acute, subacute or insidious, most patients presenting with symptoms which have evolved over days or weeks. [20] There are several typical clinical constellations [21,23] : 18-38% of cases present with a syndrome resembling benign intracranial hypertension with headache, papilloedema and visual disturbances; up to 75% of cases are characterised by a focal neurological deficit andheadache; a third group of between 30% and 50% may present with seizures often followed by a Todd's paresis.…”