Abstract
Epistaxis is a common complication of endoscopic sinus surgery. Bleeding occurs more frequently due to injury of the sphenopalatine artery branches. Pathologies of the maxillary sinus that produce bone resorption and descent from the orbital floor into the sinus, expose the orbital fat and the infraorbital artery (IOA) to an injury that can cause severe epistaxis which is difficult to treat. Two cases of epistaxis due to an injury of the infraorbital artery in the maxillary sinus are described in our study.
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