system
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human
[Batman/DC]What, specifically, is the Joker's diagnosis?

So, I haven't seen it yet, so no spoilers, but what with all the kerfuffle over suicide squad, it got me thinking...what exactly is Joker's diagnosis? He is typically shacked up at Arkham rather than Belle Reve, implying that he's been found mentally unfit to stand trial. But as I understand it(I'm not a lawyer, so maybe i'm wrong), that typically comes with some sort of a diagnosis.


So...what exactly is the Joker's condition? I'm not a psychiatrist, though I have something of a morbid interest in mental illness(family history and all), and I can't really think of any symptoms he exhibits that would lead to a specific diagnosis of any variety.
gpt
The short answer is everything.  He's got some multiple personality going on (sometimes he's a crook, others completely homicidal), obviously a sociopath, narcissism (he think the world revolves around him and Batman), biopolor (shifts from gleeful to enraged), and some obsessive compulsive.