I have a friend who is a 59 year old male. He is diabetic but it is very controlled with metformin. He has been having blackouts and grey outs for months... at one time, we thought it was due to his sugars... as he recently lost (on purpose) 65 pounds. His primary ordered a CT scan of the brain. My friend received a call that the radiologist (not his doctor) wants to see him next week. Trying to support my friend, but not sure how to... to say he is freaked out is an understatement. Any thoughts on possible conditions? Good or bad... just would help to understand some possibilities that I can research so that when the diag comes... I know how to help him.
I welcome your concern about your friend.  As narrated by you the likely cause of these presyncopal and syncopal episodes may be autonomic dysfunction due to diabetes. Some elderly people may get such symptoms due to cervical spondylosis. But your main concern is the call by radiologist. As far as I know CT is not a good modality to evaluate for this. The remote possibility of some intraventricular SOL or posterior fossa mass may cause this postural symptoms. Another possibility is that his CT may have detected some other lesion not related to present complaints. But for know be assured, first diagnosis is the likely one. May your friend be healthy and you are happy.