2-year-old female with swelling and pain at the right distal thigh Edema type signal is present predominantly within the vastus intermedialis and portions of the biceps femoris and vastus medialis. Small amount of fluid tracks along the fascial planes around the vastus intermedius. Subcutaneous edema is noted along the anteromedial thigh with small amount of fluid tracking along the fascia over the vastus medialis. Circumferential periosteal reaction and subperiosteal fluid is present with surrounding edema signal extending from the proximal femoral metaphysis to the distal femoral metaphysis. Along the lateral aspect of the distal femoral diaphysis is a T2 bright peripherally enhancing subperiosteal collection measuring 10 x 3 mm (1401/48) with underlying cortical indistinctness. There is increased T2 marrow signal with postcontrast enhancement may represent areas of infarct or osteomyelitis. Serpiginous foci of T1 and T2 hypointensity within the mid femoral diaphysis.Increased T2 signal along the posterior right ischium that demonstrates enhancement. The hip joint appears within normal limits without abnormal signal or joint effusion.
1.Osteomyelitis or infarct of the right femoral diaphysis with subperiosteal abscess along the lateral aspect of the distal femoral diaphysis. Surrounding myositis as described above.2.Serpiginous T1 and T2 hypointensity within the mid femoral diaphysis compatible with areas of bone infarct.