“…2,[5][6][7] The authors of these reports explained the mechanism of increased intracranial pressure in three ways: (i) increased CSF protein concentration and osmotic pressure; (ii) obstructed CSF absorption; and (iii) brain oedema. 5,[8][9][10][11] As the ventricular CSF protein concentration is sometimes normal 12 and brain oedema causes acute hydrocephalus only when the CSF outflow is compressed, most authors support the idea that intracranial hypertension and subsequent hydrocephalus mainly results from reduced CSF absorption, which can resolve spontaneously 6,13,14 or be relieved by CSF diversion. 2,5,7 In our patient, impaired cognition was the main indication for brain imaging.…”