A cortically based bony lesion noted at the lateral aspect proximal diaphysis of left tibia. It demonstrates predominantly hypointensity on both T1WI and T2WI at the periphery of the lesion. It measures 2.0x1.7x3.1 cm (APxWxCC). Within this lesion, two small areas of isointensity on T1WI and hyperintensity on T2WI (comparing to the signal intensity of skeletal muscle) noted. These areas demonstrate enhancement post gadolinium administration. No adjacent soft tissue lesion or collection. The previously noted soft tissue swelling on April radiograph has resolved in current MRI and CT scan.
This bony lesion has narrow zone of transition without aggressive periosteal reaction.