Cuboid stress fracture vs. Degenerative changes in OS Peroneum. How can a runner tell the difference?

If you have been running with a nagging aching pain on the outside of your foot, just in front of your ankle, you might think you have a cuboid stress fracture. 
 
If you then get an x-ray of the foot and it shows a tiny little extra bone sitting just next to the cuboid, well that bone has a specific name and it is called an Os Peroneum. 
 
Sometimes you can get pain from the Os Peroneum, sometimes you can get pain from the cuboid bone that's right next to it. 

If you're a runner and you have Os Peroneum pain, how do you tell the difference from a cuboid stress fracture? 
 
Well, that's what we're talking about today on the Doc On The Run podcast.