Runner with a stress fracture that was never broken

How is it that a runner can actually have a stress fracture that was never even broken in the first place?  Well, this is a real-world situation that I had with a runner who called me for a second opinion.  It was a runner who thought he had a stress fracture, who even had an MRI that showed a stress fracture. The doctor said it was a stress fracture. But it wasn't actually a stress fracture at all. Today, on the Doc On The Run podcast, we're talking about a runner with a stress fracture that was never broken.