Fern,
I also have that exact same type pain around my elbow area. I cannot pick up anything that requires a fist type movement of either hand. I have to be very careful about grasping anything.
I have several tests, EMG etc. and my thoracic surgeon has confirmed that this is part of the double crush injury that is part of my TOS. There was some suggestion that a ulnar nerve transposition might help, but I am uncertain that that is the answer for me right now.
I am still trying to find a way to deal with the pain that it causes, but hopefully I will find something soon.