72 year-old female with right hemipelvis retroperitoneal mass extending to the right hip There is a large fatty mass extending through the obturator foramen inferiorly and medial to the hip with several septations, but no enhancement. The mass measures 12.2 x 4.5 cm in largest AP and transverse dimensions and displaces the surrounding musculature. The underlying osseous structures appear unremarkable. A fibroid uterus is also noted.
Fatty mass involving the right hip and pelvis most likely representing a lipoma, as described above.