First of all, he appears to have had a large skull-raised forehead right from the start. Then he seems to have had less hair on one side of his head than the other as a toddler. Then, as an adult he has scars on one side of his head/ear/neck - but that's on the left, where-as the sparse hair growth was on the right. Without any medical records, who knows? This image suggests some 'work' - but there was nothing wrong with that same ear when he was a child.
