Metastatic renal cell carcinoma Evaluation of the postcontrast images limited by motion artifact.There are multiple foci of signal abnormality scattered throughout the pelvis consistent with osseous metastatic disease. The largest lesion is noted within the posterior ilium and demonstrates soft tissue extension into the overlying musculature. The mass demonstrates enhancement following gadolinium administration and measures approximately 7 x 3.9 x 6.4 cm in the greatest transaxial and craniocaudal dimensions. Just inferior to this dominant mass is an additional focus in the left ilium measuring approximately 3.4 x 1.3 x 1.8 cm which may represent a satellite lesion or extension from the more superior mass.Scattered additional foci of enhancement are noted throughout the pelvis and delineated on PACS including within the left iliac wing, the right acetabulum, the sacrum bilaterally, and the right femoral head. Additionally, there is abnormal enhancement and irregularity of the superior endplate of L4 concerning for an additional metastatic lesion with possible pathologic fracture.
Multifocal osseous metastatic disease throughout the pelvis with additional foci noted in the proximal femora and lower lumbar spine. The largest lesion involves the left posterior ilium and measures 7 x 3.5 x 6.4 cm.