MRI
Coronal T1
Coronal PD fat sat
Axial T1
Axial PD fat sat
Sagittal PD fat sat
Is this a benign or malignant mass?
Most lipomas are benign and are almost entirely fatty. Malignant lipomas (liposarcomas) are usually heterogeneous and do not contain so much fat tissue, however, the few areas with fat-like behavior suggest the diagnosis. An intermediate category exists, the atypical lipomas, which show heterogeneous areas between other areas of fatty tissue.
Anterior shoulder mass, deep to the anterior deltoid muscle fibers. Isointense to fatty tissue in every sequence included fat-sat.