I was born with a brain tumor, along with a cyst composed of bone tissue from where my skull didn't develop completely due to the tumor. I had the tumor removed when I was a toddler, but the surgeons left the cyst of bone tissue. My mother said if they had removed it, hair wouldn't grow in that location and I would be left with a bald spot. I have lived with this cyst on my head my whole life and now that I am adult, I'd like to get it removed.
I was wondering if any of the doctors out there could tell me what kind of cyst these would be considered medically and what procedures I could have done to get it removed (preferably without permanent hair loss).