Michael Phelps holds the record for the most gold medals won at a single Olympics, a total of eight, and is arguably the best Olympic athlete ever.

With all NBC ads about “giant feet” and the highly publicized facts about his physical features, some of my colleagues pointed out that Mr. Phelps has quite a few features of Marfan syndrome.

His height is 6’4” and his arm span of 6’7” is greater than his height. According to Cleveland Leader, “that is a ratio of 1.04, which is just shy of the clinical cutoff of 1.05. He is also said to have hypermobile joints in his knees, shoulders and ankles.” Mr. Phepls also has large hands and feet. Marfan syndrome is an inherited connective-tissue disorder which presents with tall stature, ectopia lentis, mitral valve prolapse, aortic root dilatation, and aortic dissection