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.