Herein the author presents a case of esthesioneuroblastoma, a rare malignancy affecting the sinonasal cavity. This uncommon lesion is thought to originate from the olfactory neuroepithelium. The mass may invade the orbit and intracranial space, and may metastasize to the neck or to distant sites. This case was successfully treated with an endoscopic craniofacial resection, multilayer skull base reconstruction, and postoperative radiation. The differential diagnosis, radiographic findings, and

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... rgical and adjuvant treatment of this rare tumor are discussed.