Thoracic Outlet Syndrome:

Asymmetry of the Anterior Scalene Muscles in Scalene Syndrome

This T1 axial image demonstrates asymmetry of the anterior scalene muscles. The arrows point to the anterior scalene muscles. The muscle on the right is about 50% larger than the muscle on the left. This can reflect either hypertrophy of the muscle on the left or spasm/atrophy of the muscle on the right. There is loss of fat between the anterior and middle scalene muscles on the left as well suggesting that the pathology is primarily on the left.
HOME IMAGE HOME TOS HOME