Dehiscence of Lamina Papyracea a Normal Variation: A Case Report in Iran

Introduction: The dehiscence of lamina papyracea (LP) is an anatomic variation of ethmoid bone that is important in endoscopic sinus surgery. Case Presentation: There are two different cases without a history of trauma. Entrapment of fat was observed without the involvement of medial rectus muscle. The variations of paranasal sinuses are common, and certain types of them are very important; for instance, the position of LP, whether medial or lateral, or the dehiscence of LP therefore regarding the position of LP in sinus surgery can prevent complications of orbit. Conclusions: Awareness of dehiscence of LP before surgery is crucial for preventing orbital complications. The present study describes two cases with medial positions and dehiscence of LP.