If you poke around data sets for long enough, you can unearth some interesting correlations. Here, the guys at Information Is Beautiful have compiled how links between you body parts and health conditions stack up.
It's worth reinforcing the fact these are correlations and that it's unlikely that strong causal links could be identified. Despite the use of the '=' marks in the visualisation, Information Is Beautiful is also keen to point that out too, adding that the "data is from a range of population studies to reveal correlations & statistical probabilities. Validity of studies may vary."
But all that boring scientific conservatism aside, the data is certainly fascinating to scan through. Just don't get too paranoid if you've a fat belly, small calves, short thighs and suffer from constipation.