In hemipelvis left there is a voluminous mass of approximately 9 cm×11×9 cm in diameter (longitudinal×cross×AP), which invades and infiltrates the piriformis, obturator internus, gluteus medius and gluteus minimus partial left. There is another similar tumor in the right pectineus thickness of approximately 9×2.4×5 cm in diameter
Figure 2: Pelvic MRI.