Well, I just got the news today, my 2 month old daughter has one as well (atop her head, and looks much like yours). The Radiologist said they are more rare atop the head.
I am a bit panicked, and trying to compose myself. I was wondering how your baby is doing now/ what has happened since. How big did it grow? Did you have it removed? If so, how?
Our next steps suggested was to have a neuro surgical consult. We live in Albany NY, and all suggestions and feedback is welcomed and appreciated.