44-year-old female with back pain and metastases seen on lumbar spine images. Evaluate for right iliac and left sacroiliac joint metastases. BONE MARROW: Note is made of a 4.5 x 3.6 cm focus of increased signal abnormality within the left sacrum about the sacroiliac joint, which enhances on postcontrast sequences consistent with osseous metastatic disease. There is associated extension to the level of the left S2 neural foramen as well as soft tissue extension into the left sacroiliac joint. Additionally, there is increased signal abnormality on fluid sensitive sequences replacing a large portion of the right iliac bone extending to the level of the superior, medial and posterior right acetabulum with associated enhancement on postcontrast sequences, consistent with an additional focus of osseous metastatic disease. There is an associated enhancing soft tissue component within the right gluteus minimus and right iliopsoas musculature consistent with soft tissue extension of metastatic disease. The imaged musculature of the pelvis is otherwise normal in appearance. There is nonspecific peritrochanteric inflammation bilaterally, left greater than right. SOFT TISSUES: There is a nonspecific 1.5 cm focus of fluid signal intensity within the subcutaneous tissue along the posterior aspect of the left iliac bone which does not demonstrate any definitive enhancement on postcontrast sequences.JOINTS: The alignment is anatomic.ADDITIONAL
Multiple foci of osseous metastatic disease with soft tissue extension as described above. Other findings as described above.