title: Pediatric Optic Nerve Meningioma: Diagnostic and Therapeutic Challenges.
abstract: A 13-year-old female presented with left unilateral proptosis, blurry vision, and diplopia. Clinical examination showed left sided visual acuity of 20/50, limited extraocular movement, 5-mm proptosis, and optic disc edema. CT and MRI displayed a large, intraconal, well-demarcated soft tissue mass with inferotemporal displacement of the optic nerve. The imaging appearance was unusual and diagnosis remained uncertain. Histopathologic analysis of the biopsy specimen confirmed the diagnosis of atypical syncytial meningioma. The tumor cells were positive for both androgen and progesterone receptors and the Ki67 stain was positive (proliferation index of 8%). The patient was treated with proton beam radiation therapy (total dose 50.4 GyE) that suppressed tumor growth and has preserved visual acuity to date (20/40). Differential diagnosis and approaches to therapy are explored.
authors.affiliation: *Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts; †David G. Cogan Laboratory of Ophthalmic Pathology, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts; ‡Ophthalmic Plastic and Reconstructive Surgery, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts; and §Head and Neck Radiology Department, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, U.S.A.
authors.forename: Seanna R
authors.initials: SR
authors.lastname: Grob
authors.forename: Frederick A
authors.initials: FA
authors.lastname: Jakobiec
authors.forename: Alia
authors.initials: A
authors.lastname: Rashid
authors.forename: Peter
authors.initials: P
authors.lastname: MacIntosh
authors.forename: Hillary
authors.initials: H
authors.lastname: Kelly
authors.forename: Aaron
authors.initials: A
authors.lastname: Fay
mesh_terms: D000293:Adolescent; D001706:Biopsy; D003131:Combined Modality Therapy; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008577:Meningeal Neoplasms / Q000175:diagnosis* / Q000628:therapy; D008579:Meningioma / Q000175:diagnosis* / Q000628:therapy; D019574:Optic Nerve Neoplasms / Q000175:diagnosis* / Q000628:therapy; D014057:Tomography, X-Ray Computed