Pathologically proven low-grade myxofibrosarcoma with all the typical features:

• patient age over 60
• painless mass
• located in the lower limb which is the most prevalent area for this lesion
• high T2 / low T1 signal consistent with myxoid tissue
• partial enhancement since only the solid (not myxoid) components enhance

The surgical specimen showed invasion into the femoral canal consistent with the MRI findings showing less well-defined fascia and edema focally extending into the femoral canal. This shows the importance of MR-graphic assessment since sonographic evaluation did not allow visualization of the extension into the femoral canal.