Endoscopic Endonasal-Assisted Resection of Orbital Schwannoma

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Orbital schwannomas are rare and despite a variety of external surgical approaches previously utilized, removal of tumors located in the deep orbital apex remains challenging. The endoscopic endonasal approach has been used increasingly for various apical tumours, but few describe this technique for orbital schwannomas. The authors describe 2 cases of orbital schwannoma removed via an endoscopic endonasal assisted approach. The first patient was a 31-year-old Cantonese female who was found to have an 11 × 8 × 8 mm right orbital apical schwannoma which was removed using an endoscopic endonasal sphenoethmoidal approach. The second patient was a 78-year-old white male who had a 28 × 17 × 18 mm orbital schwannoma removed via a transcaruncular and endoscopic endonasal-assisted approach. These findings suggest that the use of an endonasal approach may facilitate the safe removal of selected medially located orbital schwannomas whose posterior margins involve the orbital apex.

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