Suggest treatment for hematoma and jaundice

Question: Hi there,
My 11 week old son has a fairly large fluid collection on his head. The fluid moves around his skull and takes on different shapes, it feels like a water balloon. It does 't seem to cause him any pain and he his developing right on track. His pediatrician had me get an X-ray and ultrasound and there was no sign of fracture to the skull and no sign of fluid getting past the bone. He said the fluid should eventually absorb back into the body. My son was delivered by vacuum, one failed attempt, and the 2nd attempt was a success. This caused a hematoma, and a little jaundice that went away fairly quickly when he was first born. However, I don't know if this is related because his fluid collection didn't appear till the was 8 weeks old. He has had no other injury or trauma to the head since birth. I'm still very concerned about this fluid even after x-ray and ultrasound, because it's been three weeks and it doesn't seem to be getting any smaller. We have an appointment this week with a neuro surgeon, I am so worried and concerned. My pediatrician said he's only seen this in newborns. Any thoughts?