5 year has hard knot on top of her head, in the middle where her soft spot was. pediatrician has examined it, and doesn't seem concerned. should i get?

Talking with the doc: okay you are concerned about a knot on your child's head. Your doctor tried to reassure you but you remain unsure. It is important now to figure out what you really want to know and ask specifically for the answer you need. Is the knot ugly? Is it cancer? Is it from trauma? What is your worry?? It's okay to worry and you need to direct your specific question to your doc. He can't guess