Hi, I have just had an MRI done and it reflects cystic gliosis on the right frontal lobe. The scan reveals a portion of the lobe that is missing or a hole in the lobe, the doc says iy should have occurred from a head injury from an accident or blow to the head, perhaps even have caused a bleed on the brain however, I had no accidents, no falls or any head bashings since I was born. I am 40yrs old. Is there anything else that could be the cause of it ? Thanks Megan