Transverse US of the right thigh (above) shows the lesion to be diffusely hyperechoic and well encapsulated. Axial T1 MRI without contrast of the thigh (middle) shows the well enapsulated lesion in the lateral aspect of the right thigh to be slightly hyperintense to muscle and to contain some small flow voids. The mass is extremely hyperintense to muscle and fat on the axial T2 MRI (below).