Direct Intratumoral Pre-surgical Embolization of Orbital Hemangioblastoma. A Case Report

Orbital hemangioblastomas of extraretinal origin are extremely rare and few cases have been reported. We describe a 48-year-old woman with progressive right visual loss and proptosis. Computed tomography showed an avidly enhanced transpatial solid mass in the right orbit with outward protrusion. The mass was presumed to be of extraretinal origin because of its unusually large size, but there was only mild involvement of the eyeball. The histopathologic characteristics of this tumor were identical to those seen in central nervous system hemangioblastomas. The hypervascularity of the lesion would have made surgical intervention difficult. Preoperative embolization was indicated and was performed by direct tumor puncture and injection of N-butyl cyanoacrylate with a satisfactory result.