[Intracranial Anatomy and Surgical Techniques for Extended Orbital Exenteration for Sinonasal Malignancy with Orbital Apex Extension].

Gross total tumor resection for sinonasal malignancy with orbital apex extension requires orbital exenteration and bony skull base resection around the orbital apex with sufficient margins. With a detailed discussion of the anatomy, we describe our surgical procedure for extended orbital exenteration with orbital apex resection for sinonasal malignancy.