Background: Dehiscence of lamina papyracea (DLP) is a rare anomaly of ethmoid bone with a defect on the medial wall of orbit and often associated with protrusion of orbital fat and sometimes ocular muscles through that defect into ethmoid air cells. It can be congenital or acquired (post trauma/post surgery). Case Report: A 34 year old male presented with complaints of nasal congestion, discharge, sneezing which was persistent against all allergens prevention measures and intranasal steroids. No ocular complaints as such. No history of trauma / nasal instrumentation in the past. Axial CT scanning of the paranasal sinuses was performed complemented by coronal and sagittal views showed defect in left medial orbit wall with herniation of orbital fat into ethmoid sinus. Conclusion: Recognition of DLP is of utmost importance on imaging prior any nasal or/& sinus surgery so as to escape any damage to herniated orbital structures.
