Review Question - QID 7430

The T1-weighted scan reveals a lesion that contains a large amount of fat signal (bright), suggesting a fatty tumor of some kind. The gadolinium image similarly has large areas that are dark from the fat saturation, which reinforces that the lesion contains fat, although there are some areas of enhancement within the lesion that suggest more than just simple fat is present. The sagittal T2-weighted image confirms the presence of edematous tissue within the mass, suggesting that this lesion is most likely a liposarcoma, one of the most common soft-tissue sarcomas. The other lesions listed do not have any distinguishing MRI characteristics. Synovial cell sarcomas are often cystic in nature and do not contain significant amounts of fat.