PMC4813064_01
(A and B) Axial post contrast CT images at the level of brainstem show thickened and enhancing cisternal segment of left oculomotor (white arrow) and bilateral trigeminal nerves (black arrows)
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F1
Contrast CT brain was done and revealed homogenously enhancing bilateral trigeminal, left oculomotor right facial and vestibulocochlear nerves [Figure 1].
(A-D) MRI shows diffuse thickening and enhancement of the cisternal segments of both oculomotor (black arrows), trigeminal (white arrows), and vestibulocochlear and facial nerves (open black arrows). There is also thickening of left abducens, and bilateral glossopharyngeal, vagus, and accessory nerves (open white arrow). (E and F) Thickening of C6 and C7 anterior spinal nerve roots (white arrows)
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F2
MRI cervical spine screening was done which showed thickening and enhancement of right cervical C6 and C7 spinal nerve roots [Figure 2].
(A and B) PET scan images show absence of uptake elsewhere in the body, ruling out the possibility of metastatic cranial neuropathy
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F3
Low power microscopy (x10) image showing diffuse proliferation of small round lymphoid cells having monotonous appearance with few intermediate to large cells infiltrating neural tissue
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F4