 Originating within the left supraclavicular region there is a lobulated, minimally septated fatty mass with a thin fibrous capsule. There is mild enhancement in some regions of the capsule, but no nodularity or focal enhancement within the mass is evident. This mass measures approximately 13 cm in AP dimension by 15 cm in ML dimension x 7.5 cm in CC dimension, and while it originates within the left supraclavicular region, it is seen to extend anteriorly beneath the left clavicle. The mass does not approach or invade the spinal canal. The mass elevates the trapezius and mildly displaces the deltoid and contacts the supraspinatus muscle posteriorly and anterior/medial scalenes medially, however there is no fatty atrophy of the musculature adjacent to the mass. There is mass effect upon the entire brachial plexus, which appears to be inferiorly displaced, however the nerves are not encased.MRA NECK
There is a fatty, minimally septated mass with a thin fibrous capsule within the left supraclavicular region which has an appearance most consistent with a benign lipoma. There is mass effect upon the entire brachial plexus, which appears to be inferiorly displaced, however no encasement of nerves or arteries is evident.