How to get help for a friend

Hello,
I am acquaintances with a girl whom I believe has a factitious disorder.
It started last year. She began telling people about her rough upbringing, such as her mother's crippling bipolar disorder and her absent father, which surprised us all because her family has visited us many times and definitely did not seem to be out of the ordinary.
Then she started telling us about her IV drug use, which I, as a medical professional, questioned due to her lack of lower arm scarring. She then told us she had received multiple skin grafts and plastic surgery to cover the marks. I have never heard of such a thing, nor have any of my friends, and I could not find information on it, so it struck us as odd.
Next, she told us very casually that she had AIDS. I used to be an HIV counsellor, so I asked her what medicine she was taking. She said she was not taking medicine because she had a special strain of HIV that couldn't be medicated but also wasn't contagious. This is unlike any HIV I have heard of, and I am very well versed in the literature available.
Next, the mental illnesses/learning disabilities started. She told us she had major depression, bipolar, borderline, dyslexia, ADHD, Tourette's, and a litany of other disorders I can't remember. Her symptoms only occurred around certain people and were extremely atypical.
About 8 months ago, she bagan having seizures. I grew up with an epileptic, so I am well versed in seizures and seizure protocol. She rolls in circles on the floor for hours, during which time she is fully conscious and able to verbalize requests. She does not lose bowel or bladder control either.
Last week, after a 4 hour seizure she claimed to have total retrograde amnesia, which led to her being hospitalized against her will. She says that at the hospital they diagnosed her with a malignant, golf-ball sized tumor. My mother's husband who is a neurosurgeon says that if this were the case, he would give her no more than a few months to live, and yet she claims that it is "slow-growing" and they will be treating it with a special kind of chemo that doesn't make you sick or your hair fall out.
I know she has some sort of disorder and that we aren't helping her by feeding into her delusions. But how do I even go about addressing this? Any advice?

This sounds a difficult situation to be in. It certainly sounds like something is up. Do you feel OK enough in your friendship to challenge her in some way? Perhaps by gently saying that you have some concerns about all these illnesses she has and does she want to talk about it. It wont be easy but I think it might help to talk to her about how you have concerns. If she does not want to talk about it then you might have to start to think about how much you want to be a part of all of this tho again I know this is tough. Please let us know how you go

Cracked