title: Retrobulbar orbital metastasis mimicking meningioma.
abstract: A 45-year-old woman was found to have an intraorbital mass on CT. CT images showed a markedly enhanced retrobulbar mass with optic nerve lucency, producing a characteristic "tram-track" sign. Signal intensity patterns on spin-echo MRI seemed to indicate meningioma. The pathological diagnosis was scirrhous carcinoma of the breast. This case was not distinguishable from meningioma on CT or MRI.
authors.affiliation: Department of Radiology, Akita University School of Medicine, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Hashimoto
authors.forename: N
authors.initials: N
authors.lastname: Tomura
authors.forename: J
authors.initials: J
authors.lastname: Watarai
mesh_terms: D002293:Adenocarcinoma, Scirrhous / Q000175:diagnosis* / Q000556:secondary; D001943:Breast Neoplasms / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008577:Meningeal Neoplasms / Q000175:diagnosis*; D008579:Meningioma / Q000175:diagnosis*; D008875:Middle Aged; D009918:Orbital Neoplasms / Q000175:diagnosis* / Q000556:secondary; D014057:Tomography, X-Ray Computed