I ran across this (slightly old) news story while searching for pictures of MRI scanners, and it was a revelation to me! Being across the pond in Merrye Olde Englande, I had heard that the rabid frontiers of the American right wing are convinced that Barack Obama is a Muslim who was born outside of the US, but I hadn't come across the parallel accusation that he's had brain surgery, based on what supposedly looks like a scar on the back of his head. There was coverage in the Daily Mail - and David Icke, everyone's favourite herpetologist, also jumped on the theory: a sure sign of credibility.
Obviously the pictures mean pretty much nothing at all. Maybe his hair just grows that way. Maybe he cut his head open in the playground as a kid. Maybe he actually did have brain surgery. Maybe those scars are where his lizard masters buried into his body and started wearing him like a glove. But the rhetoric around it all was both amusing - why is it that apparently becoming the President of the United States entitles the world and his dog to see your complete medical records? - and sad.