T1-weighted turbo spin echo MRI with gadolinium contrast of the right thigh in axial plane. An anterior compartment mass (yellow arrow) measuring 26 × 19 × 14 cm. The central non-lipogenic component measures 24 × 19 × 14 cm and demonstrates irregular, inhomogeneous nodular peripheral enhancement. Peripheral fat densities are present. There is no invasion of the femur (green arrow), profunda femoris artery/vein (red arrow), or superficial femoral artery/vein and posterior division of the femoral nerve (blue arrow). The rectus femoris muscle is completely encased by the tumor. The sartorius, vastus medialis, and vastus intermedius muscles are almost completely encased by the tumor. The vastus lateralis is partially encased and posteriorly displaced by the tumor. There is no tumor involvement beyond the anterior thigh compartment.