Hi Demian, Welcome to our MM family!
Yes you should be posting here, without a doubt. We invite you to learn all you can about this rare disease, and ask any question you might have along the way. There is a wealth of information here, and people who know what you’re going through, and we're here for you.
It’s heartbreaking to see all that your precious little girl has been through, God love her! I have to agree that all the signs/symptoms do appear to be MM. Had they did an Angio four and a half years ago, she may have been diagnosed sooner. The MRI/MRA does not always detect MM in early stages of this disease or if the medical team is not familiar enough with this rare disease, and many doctors do not order an angio for a child, that’s why this disease goes undiagnosed until after a stroke so often. The Angiogram is the definitive test to diagnose MM; it actually shows all the tiny MM vessels. (Collaterals)
I also have to say, Abby will be in excellent hands!! There are only TWO MM specialists in the country that deal with MM on a daily basis, and Dr. Scott is one of them. So having a MM specialist, and all our prayers, she’s on the best path she can be, IMO.
I also have to commend all your research and trying to learn all you can about this disease. Arming yourself with knowledge is the key when dealing with a rare disease.
Please keep us posted.
My thoughts and prayers are with you all and special hugs to Abby.

Mar