Fig. 12
From: Lesions involving the outer surface of the bone in children: a pictorial review
Septic cortical osteitis. Antero-posterior radiograph of the left humerus a shows irregular inhomogenous lamellated periosteal reaction at the left lateral cortical surface of the diaphysis (thick arrow). There is an associated obliquely oriented fracture through the proximal humerus. Axial fat suppressed T2 b and coronal fat suppressed T2 c images demonstrate an intracortical hypointensity with surrounding edema through the medullary cavity and the adjacent soft tissues. An axial post-contrast injection image d shows peripheral contrast enhancement surrounding an intracortical hypointensity and enhancement through the medullary cavity and surrounding soft tissues (thin arrow)