Welcome to HW! I can relate 2 yrs ago I was admitted to the Hospital for Osteomyelitis of the left foot (turned out to be cellulitis from lympaedema)...my xrays showed the ankle had fused, I didn't understand what the heck they were talking about until the Dr. said when did they fuse your ankle....I was stunned I said uh you have the wrong patient. Have no idea how it happened, I have nerve damage and have had several falls, no breaks though, they told me could be from repetative injuries....I can only move mine up and down too! The ankle on that side is larger then the other, so it does look weird. Can't really say its painful because if the nerve pain and numbness but it is very weak, I find I cannot step down with that foot 1st as it gives out with no warning!
The Dr.s didn't make a big deal out of it, so I just figured it was another thing to add to my list! The CP from prior Cervical Fusion and nerve damage to both legs is worse then the pain from the ankle! Hope this makes sense.
Hope it helps to know there is someone else out there with this problem!