Fig. 6
From: Imaging findings of the orbital and intracranial complications of acute bacterial rhinosinusitis
Subperiosteal abscess: a) Axial ceCT image in a soft tissue window showing opacified ethmoid sinuses; preseptal cellulitis (*); and a small crescent shaped soft tissue mass (arrow) adjacent to the lamina papyracea, highly suspicious for subperiosteal abscess. b) Coronal ceCT image in another patient with opacification of the right ethmoid sinus (E) and a crescent shaped fluid collection adjacent to the medio-superior orbital wall, suspicious for subperiosteal abscess