Magnetic resonance image distal femoral osteomyelitis and subperiosteal abscess

Axial (A) and coronal (B) magnetic resonance images (post gadolinium infusion) of a seven-year-old with distal femoral osteomyelitis and subperiosteal abscess. The abscess is posterior on the axial view (arrow) and medial to the distal femur on the coronal view (arrow). The pus is dark and surrounded by an enhancing rim.