Abstract
Complications of endoscopic sinus surgery can be prevented by understanding of clinical anatomy and preoperative evaluation of anatomical variations between patients, and giving attention to some high-risk areas, namely lamina papyracea, the roof of the ethmoid sinus, latecal lamella of the cribrif orm plate, the optic canal, the anterior and posterior ethmoid arteries, the sphenopalatine artery and the internal carotid artery . It is also important to find the surgical complication as soon as possible if it occured . In most cases you can prevent a complication from developing into a serious one by finding it immediately and treating it in the proper way . However serious comlications can occur in endoscopic sinus surgery, if you do not give attention to important points mentioned above.
