I suggest doing an ultrasound
Hi...first be reassured that as the kid is normal, nothing serious is going on with him. Am glad to know that even his pediatrician
there has suggested Lipoma
(pad of fat) or a caput or a cephalhematoma
If I were your pediatrician I would consider doing a ultrasound of the area to be doubly sure of what is happening.
I wish your kid a speedy recovery. If you need any future medical consultation and suggestions, I will be glad to help. You can approach me at the following link. Please find the link below.