Table 1 Modified Dandy criteria according to [9, 11]

1

Symptoms of raised intracranial pressure (headache, nausea, vomiting, transient visual obscurations, or papilledema)

2

No localizing signs with the exception of abducens (sixth) nerve palsy

3

The patient is awake and alert

4

Normal CT/MRI findings without evidence of (acute) thrombosis

5

LP opening pressure of > 25 cmH2O and normal biochemical and cytological composition of CSF

6

No other explanation for the raised intracranial pressure