I will share Buster's story with you. Buster was born to a feral mom on my porch, she had two sibs (one didn't survive, the other had palsy and lived to 18 months - my friend took him). The sib started to have convulsions and epilepsy and that is how he died. When Buster turned 2, she started to have the same epilepsy convulsions and needless to say, I freaked out. I took her to a specialist as these episodes continued and because there was no pattern to the episodes, he didn't want to prescribe anything, instead he wanted to do exploratory surgery in her head to see if there was a tumor or something there causing it.
When I asked the question that Larry posed - if you do this, what happens next - the answer was well then we know and she may not have long to live.
I then asked about the invasiviness of the procedure and recovery and he said well it is opening up the skull and exploring, but it doesn't hurt and recovery he couldn't say.
Forget the expense which was another concern.
I said, if all you are doing is seeing if there is a tumor and not doing anything else, like solving the problem, then NO THANK YOU - I will not put Buster through that. The vet wasn't pleased and wrote a nasty letter to my primary vet about my not accepting his recommendations and going against medical advice blah, blah blah.
For the next year to two years, Buster continued to have intermittent seizures and then the time between them got longer and longer and longer and today Buster is 10 years, still alive, hasn't had a seizure in years and is just fine.
Now that isn't to say that she couldn't have died like her sib and I was even prepared to come home one day and find her dead or comatose. I look at each day, each year with her as a blessing and have never regretted not allowing the vet to do exploratory skull surgery.
And yes, Buster was young, but there was no way I could put her through that, just to satisfy the vet's curiosity and not change anything - only tell me that she may have a tumor and die. Well I was prepared for that anyway.
Now, you are in a similar situation and I suggest you write down all your questions, weigh the pros and cons and decide what is in the best interest of Mali and would she even survive such a procedure......and if money is a concern at all, well that is something else you need to factor in. And yes, you do, because you will put out money and for what? You won't have fixed anything and still may not have answers and/or find that you can't fix her or doing so will be painful and cost prohibitive......