Not actually that rare to see. Reabsorption of bone is fairly common place in non unionized fractures that don't end up getting good blood flow. Osteoclasts will breakdown the bone fragments that don't unionize, especially if the bone isn't really responsible for weight bearing.
The only thing thats fake about this is a group of doctors being mystified by any of it.
One of the best things about my job is that our clinic's offices share a hallway with the hospital's charitable organization, and they have two golden lab "therapy dogs".
A lot of the clinicians keep dog treats in our offices and once or twice a day the doggos will politely paw at people's doors for treats and pets time. They are by far my favorite co-workers.