You might want to explore on our thoracic outlet syndrome forum (TOS) for short..
Specifically look/ or search for double crush or triple crush syndrome..
Carpal or cubital tunnel along with TOS - but there are also mis diagnosis of ulnar or carpal when TOS is the real cause.. based on the clavicle /top rib crowding, pinching, compression of nerves or blood flow in those areas.

TOS sticky threads -
Our Useful Links - Websites, Articles & Polls
http://neurotalk.psychcentral.com/thread84.html
http://neurotalk.psychcentral.com/thread125577.html