Jenny...... I went to my friends to ask about your MRI's, the best feedback I got was this from my friend Julie in NH:

Glenn,

I'm sorry I don't know what that is. I do know that after my stroke it showed up as a white blob, in the back of my head, on my MRI. She has every right to ask the radiologist to look at those areas again. She can put a request, in writing, in at the hospital where the MRI was done to ask the radiologist to take a 2nd look at that area.

Julie

Hope this helps Jenny ....... Glenn