Hard lump on forehead since childhood; am I a candidate for removal? (photos)

I have a hard lump on the left side of my forhead that has been there ever since I was a child my parents have said it was there as a result of me allways falling over and hitting the left side of the forhead all the time it is a solid bone mass that does not move and does not hurt it has not got any bigger in shape or size it has always has stayed the same I want to know what does could be and if possible if it could be removed I will attach some pictures of my CT scan Can anyone help Thank you