PMC3640228_01
Patient in Case 1. A normal head CT (left) and a normal MRV
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F1
Computed tomography (CT) scan and magnetic resonance imaging/magnetic resonance venography (MRI/MRV) were unremarkable [Figure 1].
PMC3640228_02
Patient in Case 2. Axial T1 MRI without (left) and with Gadolinium demonstrating thick nodular enhancement of the bilateral optic nerves
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F2
In addition, the patient's optic nerve sheaths were dilated and demonstrated thick nodular enhancement diffusely [Figure 2], consistent with leukemic infiltration of the optic nerve sheaths.