Fig. 13
From: Lesions involving the outer surface of the bone in children: a pictorial review
Septic cortical osteitis with subperiosteal abscess formation in a 7-year-old girl. Antero-posterior radiograph of the left tibia a shows an ill-defined lucency at the lateral aspect of the proximal tibial metaphysis (arrow). Axial STIR image b reveals a crescentic, hyperintense fluid collection adjacent to the proximal tibia at this level. This collection is hypointense with peripheral enhancement as seen on the post-contrast axial c and sagittal d images. Enhancement can also be seen through surrounding soft tissues