if your child had/has a cyst on head?

If you look between my sons eyes you can see a bump there. He has had it since birth. The doctors think it is a cyst because it is mobile. It is really hard. Have any of you experienced this. He gets an ultrasound on the 8th over it. I a hoping it is nothing bad. They called me today to schedule the ultrasound appointment and called it my "sons lesion" Idk what the hell that means? God I am just terrified.

A lesion is just a term for cyst or tumor or any kind of growth. My kids have neurofibromas so I know some about that type of stuff.

I have a cyst on my hand and they've never done anything about it... didn't cause any problems for me.