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  • Courtesy of Gregory D. Avey, MD.
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    Left optic nerve glioma in a patient with neurofibromatosis type 1 (NF1). T1-weighted axial MRI (A) and T2-weighted axial MRI (B) demonstrate left proptosis from an enhancing retrobulbar mass, with fusiform enlargement of the optic nerve and stereotypical kinking of the nerve (arrow).