Originally Posted by cocar

It's definately an anchor screw. I'm certain they didn't put it there by mistake. Did you blow out a tendon when you fractured your arm? They might have used that screw to anchor a piece of heavy suture to the bone to help repair a torn elbow tendon and make it more stable (the suture won't show up on an x-ray, only bone and metal). Usually those screws are used to anchor suture or wire to the bone in a spot where there is nothing else to attach it to. And they should be left in. I can't tell for sure, I'm just speculating...but I don't think you need to worry about it.

You can just wait until your surgeon gets back to ask him about it. It's nothing to panic over.