Background Thoracic Outlet Syndrome (TOS) is a syndrome involving compression at the thoracic inlet, which is known clinically as the superior thoracic outlet resulting from excess pressure placed on ...

To describe the technique and complications of sonographically guided anesthetic injection of the anterior scalene muscle in patients being investigated for neurogenic thoracic outlet syndrome.

Neurogenic TOS is most often the result of neck trauma such as a whiplash injury. Slipping and falling on floors or ice, or repetitive stress from working on assembly lines or keyboards are the next ...