My son who's 33 has a hard lump on his head. It's not changed at all in size he's had a long time but he's starting to wake up and he knows it's there. Could this have been caused by treatment he revived as a child? He has congenital heart problems and also suffered with ALL age 3 1/2 he's been in remission a lot of years. I always worry about him. Could someone put my mind at ease please
