MRI provides advanced imaging of the soft tissues that is not always readily apparent on X-rays and CT scans. MRI shows us the extent of the tumor and proximity to the important nerves and blood vessels that need to be preserved for a functional extremity. The MRI provides a map for surgery. CT scans and X-rays can help with evaluation of soft tissue masses by determining if calcification or mineralization exists in the tumor or if there is invasion of adjacent bones. Soft tissue sarcomas can spread to the lungs, bones and liver. CT scans of the chest, abdomen and pelvis and a whole body bone scan can be used to evaluate for spread. Sometimes, a whole body CT-PET scan is substituted for these studies.