Radiologic Imaging Defines the local extent of a tumor Can be used to stage malignant disease Aids in the diagnosis Monitoring tumor changes after treatment Detecting recurrences after resection CT Scan is the preferred imaging technique for evaluating retroperitoneal sarcomas, while MRI is for soft tissue sarcomas of the extremities

Preoperative CT Scan of Abdomen Large, heterogenous mass compressing adjacent structures Consistent with findings in retroperitoneal liposarcoma

Chest X-Ray after 18 months Multiple metastatic lung nodules

CT scan after 18 months Multiple, heterogenously enhanced bilateral lung nodules

Management of Recurrence Retroperitoneal sarcomas recur locally in up to 60% of patients Surgical excision, if possible, is the preferred treatment