What's the diagnosis?

This is Kohlers disease of the Navicular.

http://en.wikipedia.org/wiki/K%C3%B6hler_disease
http://www.whonamedit.com/synd.cfm/2676.html

The condition is quite rare but if you work in PED you will see it every so often. It is often missed initially and so I think we can forgive St Elsewhere for looking at the hips first. Let's face it hip pathology is much more common in this age group.




Name 5 other related conditions!
Kohler's is a disease that belongs to a group known as the osteochondroses. Most people think there are about 10 so you should have got 5 of them!

http://www.wikiradiography.com/page/Osteochondroses