Alternative Names: TOS
Thoracic outlet syndrome is an uncommon condition usually presenting with pain in the neck and shoulders, numbness and tingling in the inner forearm, pinky and ring fingers, and a weak grip.
Common causes of thoracic outlet syndrome include:
In some cases the cause is unknown.
Symptoms may include:
Diagnosis involves first ruling out other conditions, such as carpal tunnel syndrome or nerve damage. Electromyography (EMG), CT angiogram, MRI, nerve conduction velocity study, and X-ray may be used to narrow down the problem.
Treatment usually involves physical therapy, pain relief and improved posture. Surgery may be required if physical therapy and behavioral changes do not improve symptoms: An extra rib may be removed, and certain muscles cut.