https://www.healthtap.com/user_questions/700545

Dr. Laurence Badgley answered:
Is surgery effective for thoracic outlet syndrome ?

Maybe
Before surgery, one should do everything they can to reconstitute the muscle and skeletal systems of the shoulder. My clinical findings implicate weakened muscles that hold up the shoulder and keep the collar bone from collapsing toward the first rib; thereby constricting the space between these two bones.
Trapezius muscle strength is of utmost concern, and a good physical therapist can help