Viva 1

A 55 year old lady presents to the Emergency Department irritable, confused and complaining of a severe headache.  Her husband reports that she had been very drowsy since earlier that day when she was heard to suddenly cry out.  She was apparently well the day before.   Examination findings include Temp 37.8 deg C, HR 95, BP 150/80mmHg, RR 24, Pulse oximetry 91%, GCS E2, V3, M6.

List the most likely differential diagnoses.

Disclaimer: the viva stem above may be an original CICM stem, acquired from their publicly available past papers. Or, perhaps it is a slightly altered version of the original CICM stem. Or, it is a completely original viva stem, concocted by the monstrously amoral author of Deranged Physiology for nothing more than his own personal amusement. In either case, because the college do not make the main viva text or marking criteria available, almost everything here has been confabulated. It might sound like a plausible viva and it could be used for the purpose of practice, but all should be aware that it does not represent the "true" canonical CICM viva station.