Day 6 coronal MRI scan. A coronal T2 short inversion time inversion (STIR) image (Siemens 3T MRI scanner; Munich, Germany) was taken of the lower limbs and pelvis from approximately 5 cm above the iliac crest to approximately 10 cm below the knee joints on Day 6 after hospital admission. The image showed focal, high signal intensity muscle edema of the anterior compartment of the thigh, almost exclusively limited to the vastus intermedius muscle with minimal affection of the vastus medialis and biceps femoris (green arrows). Multiple bone infarcts (blue arrow) were seen in both the femur diaphysis as well as the iliac bones on both sides. There was also a small amount of muscle edema seen in the muscles around the iliac bones. In addition, there was significant periosteal lifting with associated fluid signal (red arrows) medially along both femur shafts where the infarcts had occurred in the thighs.