Loris's medical diagnosis is a paper note in the Fallout 76 update Wastelanders.
Location
It is obtained from Doctor Loris during Overseer, Overseen if the player character agrees to their plan.
Transcript
In my professional opinion, Head Engineer Brass is suffering from delusional behavior. Extreme paranoia and mood swings. Revenge fantasies targeting members of the medical staff.
Isolation and sedation are the recommended course of treatment. Full authority for his care should be given over to me.
With the Overseer's approval, we can begin Brass's healing process immediately.
Signed,
Doctor Loris