Apologies if this has been stated already, but if Yaniv actually did have a brain tumor, even a benign one, it could be causing manic, bipolar, etc. behavior.
Wouldn't it be oh so interesting for him to turn out to actually have one after faking it?
These days he's not claiming to have a brain tumor, interestingly enough.
He appears to have had extensive neurological testing this summer, so it would be a wily tumor that can hide from modern MRIs, though a tumor could begin to form today, say, and trouble him by the end of the year. Irony never sleeps.
He may be facing neurosurgery nonetheless.
Null had a source who said Yaniv has
hydrocephalus. It can be caused by, yes, a tumor - or by birth defect or even obesity - that impedes the flow of the cerebrospinal fluid in which the brain floats. If the fluid builds up in the brain's ventricles, it creates pressure that leads to some of the symptoms that Yaniv describes online, like loss of coordination and balance.
From what I've read at the layman's level, the many symptoms the condition causes don't include things that mimic bipolar, though it can impede thinking, reasoning, and memory and can cause lethargy that I guess could be mistaken for depression.
Yaniv's said a few times that his doctors referred him to a neurosurgeon who won't see him for a consultation until June 2020, so it appears his condition, whatever it is, doesn't strike doctors as urgent. If he does have hydrocephalus, the likely procedure would be to implant a stent or shunt - a tube placed in the ventricles of the brain that would let excess cerebrospinal fluid drain into his body cavity.
Seeming to confirm what Null's source said, Yaniv at one point in his hospital soap opera posted on Facebook that he'd fled the ER one night without being seen because he saw "stint" on his records. That was probably "stent." It is, in fact, not great news since complications caused by infections or clogging are not uncommon and the procedure has to be repeated.
Yaniv, though, has never referred to hydrocephalus. His most recent claims have been about epilepsy or syncope. But then, as I've asserted before, he says little about his real medical problems, preferring to yammer about his inventions.
He's had little to say about his medical problems in the last month. I've wondered whether he's moved his discussion of it somewhere on the sosh that we're not watching.