title: Waiting to deliver a final diagnosis.
abstract: We report a patient with left eye positional transient visual obscurations, diplopia, a left afferent pupillary defect, and optic disk edema-all occurring during pregnancy. Noncontrast magnetic resonance imaging revealed an orbital mass encasing the optic nerve and extending through the superior orbital fissure into the cavernous sinus. An magnetic resonance imaging with gadolinium after parturition and strongly positive somatostatin receptor scintigraphy suggested the diagnosis of meningioma. Biopsy confirmed the diagnosis, and she was treated with CyberKnife stereotactic radiosurgery. In cases of atypical presentation, somatostatin receptor scintigraphy can help distinguish optic nerve sheath meningioma from alternative orbital masses.
authors.affiliation: Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, Minnesota, USA. Electronic address: mokh0003@umn.edu.
authors.forename: Ali
authors.initials: A
authors.lastname: Mokhtarzadeh
authors.affiliation: Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, Minnesota, USA.
authors.forename: Amanda
authors.initials: A
authors.lastname: Maltry
authors.affiliation: Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, Minnesota, USA.
authors.forename: Collin
authors.initials: C
authors.lastname: McClelland
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004172:Diplopia / Q000175:diagnosis / Q000209:etiology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008577:Meningeal Neoplasms / Q000150:complications / Q000175:diagnosis*; D008579:Meningioma / Q000150:complications / Q000175:diagnosis*; D019574:Optic Nerve Neoplasms / Q000150:complications / Q000175:diagnosis*; D011247:Pregnancy; D011252:Pregnancy Complications, Neoplastic; D013997:Time Factors; D014792:Visual Acuity
keywords: optic nerve sheath meningioma; orbit meningioma; orbital tumor; somatostatin receptor scintigraphy