22-year-old female with Ewing's sarcoma Left femur: Patchy and curvilinear signal abnormality and enhancement within the distal femoral metaphysis including ringlike foci with central fat appears decreased in extent compared with the MRI of the tibia and fibula dated 3/28/14 which included the distal left femur. We suspect these represent areas of bone infarction although treated metastasis is a possibility. The remainder of the signal intensity of the femur is within normal limits. The left femoral trochlea appears shallow suggesting trochlea dysplasia with slight lateral translocation of the patella. The soft tissues are unremarkable. Abnormal ringlike signal intensity seen on the large field-of-view images in the proximal right tibia may represent evolving infarction or treated metastases, also less prominent than on the prior exam.Right and left hips: We see no abnormal signal or enhancement in either the proximal femurs or pelvis. The hips and SI joints appear normal. There is no joint effusion or evidence of synovitis. Note that this exam was not protocoled for evaluation of the labrum. The soft tissues are within normal limits.
1. Normal hips and pelvis without evidence of metastatic disease.2. Foci of signal abnormality in the distal left femur and proximal right tibia as described above, which are less prominent than on the prior exam and we suspect represent evolving bone infarctions, although treated metastases are also considered.