Symptoms and signs of increased ICP (headache, papilloedema) |
No localising findings on neurological examination (except sixth cranial nerve lesion(s) or rarely other false localising signs) |
Normal neuroimaging with no evidence of venous obstructive disease |
Increased ICP as measured by lumbar puncture (>25 cm CSF) |
Normal CSF constituents |
Awake and alert patient |
No other cause of increased ICP present |
Benign clinical course apart from visual deterioration |
ICP=Intracranial pressure.