Abstract
A 71-year-old woman presented to our institution with a 2-week history of concentric bilateral left accentuated visual field loss. Examination of her eyes including funduscopy was normal. A gadolinium-enhanced magnetic resonance tomography showed contrast enhancement of the optic pathway in the T1-weighted sequence that included both optic nerves, the optic chiasm, and the left optic tract. Differential diagnoses of this kind of lesion extending along the optic nerves include neurosarcoidosis, lymphoma, and glioma. The patient was treated with high-dose corticosteroids under the suspicion of neurosarcoidosis. During that time her vision deteriorated, resulting in amaurosis on her left eye and marginal peripheral vision on the right. A biopsy of the left optic nerve revealed a pilocytic astrocytoma, which to some extent contrasted the observed clinical course. After discussing the treatment options including radiotherapy and chemotherapy, the patient opted for supportive care and died 3 months later.
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