Am I the only one who doesn't want to read about this? That's like announcing Koizumi's got a sudden rash on his butt, we don't want to know! I don't even know what polyps are, but it sounds gross.
A polyp is just an abmormal, spurious growth, like a wart. And the duodenum isn't such a gross location - it's where the stomach and small intestine meet.
You can bet there were pictures, mousepotato - I doubt they diagnosed this thing with an MRI. They probably went in with an endoscope and had plenty of pictures, which have since been deleted.