RT Journal Article SR Electronic T1 Dehiscence of the lamina papyracea of the ethmoid bone: CT findings. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 151 OP 153 VO 15 IS 1 A1 G Moulin A1 P Dessi A1 C Chagnaud A1 J M Bartoli A1 P Vignoli A1 J Y Gaubert A1 F Castro A1 L Delannoy A1 A Sibartie YR 1994 UL http://www.ajnr.org/content/15/1/151.abstract AB PURPOSE To describe the CT findings characterizing dehiscence of the lamina papyracea. METHODS Axial and coronal CT scanning of the paranasal sinuses was performed on 783 patients. RESULTS Dehiscence of the lamina papyracea was noted incidentally in six patients. In all cases dehiscence was characterized by protrusion of orbital fat through a gap in the anterior ethmoid. The posterior limit of the dehiscence was always the basal lamella. The anterior limit varied. CONCLUSION CT scans are often taken to detect polyps or assess chronic sinusitis. Awareness of dehiscence of the lamina papyracea is important to avoid misdiagnosis as infectious or tumoral process and possible injury of the orbit during endoscopic surgery.