Neuronavigation-guided endoscopic endonasal excision of an intraorbital intraconal cavernous hemangioma.

A 50-year-old man presented with the complaints of gradual decrease of visual acuity in his left eye since 2 years. Brain magnetic resonance imaging revealed a left intraorbital intraconal round mass lesion consistent with cavernous hemangioma. Binostril endoscopic endonasal approach was performed with the aid of neuronavigation. The lesion was well capsulated and easily dissected and resected totally without complication. Early postoperative course was uneventful. Three-month follow-up after surgery revealed that the visual acuity and visual fields of the patient were normalized, and magnetic resonance imaging demonstrated total excision of the lesion.