Definition of Thoracic outlet syndrome:

Thoracic outlet syndrome is a combination of pain in the neck and shoulder, numbness and tingling of the fingers, and a weak grip. The thoracic outlet is the area between the rib cage and collar bone.

Causes, incidence, and risk factors:

Thoracic outlet syndrome is a rare condition caused by compression of blood vessels and nerves in the area of the clavicle (collar bone). This compression usually is caused by the presence of an extra cervical rib (above the first rib) or an abnormal tight fibrous band connecting the spinal vertebra to the rib.

People with long necks and droopy shoulders may be predisposed to develop this condition because of extra pressure on their nerves and blood vessels.