Sleeping a little too much?

One of the patients that I encounter this morning during the Psychiatric Liaison round. 41 year old gentleman was referred to the PSY team for methadone replacement therapy. He is an ex heroin addict presented with 2 days history of altered consciousness and excessive drowsiness. The wife claimed that he was unusually sleepy and tired over the few days prior to admission. There were no documented fever, seizures, limb weakness. Systemic reviews of the cardio, respi, genitourinary system were unremarkable. FBC was normal with total WCC of 6x10^9. Comment on the CECT findings and I will post up what was reported by the radiologist.