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P364: TEAM-BASED ENDOSCOPIC MANAGEMENT OF A GIANT SINONASAL-ORBITAL OSTEOMA WITH VASCULARIZED FLAP RECONSTRUCTION
David Ahmadian, MD¹; Farhoud Faraji, MD, PhD¹; Thomas Beaumont, MD, PhD²; Catherine Y Liu, MD, PhD³; Carol H Yan, MD¹; Adam DeConde, MD¹; ¹University of California, San Diego, Department of Otolaryngology - Head & Neck Surgery; ²University of California, San Diego, Department of Neurological Surgery; ³University of California, San Diego, Department of Ophthalmology

We present a case of a 67-year-old man with chronic rhinosinusitis and a giant ossified sinonasal–orbital mass. Imaging revealed extensive involvement of the left maxillary sinus, orbit, and anterior skull base. A multidisciplinary team performed an expanded endoscopic endonasal transpterygoid–transmaxillary–transorbital approach with gross total resection. Reconstruction utilized a Resorb XG orbital implant, right nasoseptal flap, and left inferior turbinate flap. The patient was discharged on postoperative day two, with improvement in obstruction and diplopia recovery.

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