Fig. 1From: Homocysteine is related to enlarged perivascular spaces in the brainstem in patients with isolated pontine infarctionExamples of Isolated pontine infarctions. (A) PPI. DWI showed an infarction extending to the surface of the pons with CTA showing ≥50% stenosis in the basilar artery. (B) PPI. DWI showed an infarction reaching the pontine surface with irregularities of the basilar artery wall seen on CTA. (C) SDPI. DWI showed a lacunar infarction not reaching the basal surface of the pons without vertebrobasilar artery stenosis seen on CTABack to article page