PMC6679848_01
(a) Numerous periventricular deep white matter demyelinating lesions. (b) Coronal view: note the sizeable pontine lesion. (c, d) Contrast enhancement before (c) and after (d) therapy with rituximab.
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fig1
Particularly troublesome was a sizeable lesion of the left ventrolateral pons, which was pressing the pyramidal tracts (Figure 1). Furthermore, there was no contrast enhancement in any of the lesions (Figure 1).