Perfusion-weighted magnetic resonance imaging in XXXX : characteristic patterns and change after surgical intervention: case report.

@entity1 @entity64 @entity4065 @entity7025 @entity2287 @entity1779 @entity385
OBJECTIVE AND IMPORTANCE: @entity7025 is a progressive @entity4065 of the intracerebral vessels resulting in @entity64 , @entity1779 , and alteration of cerebral perfusion. Perfusion-weighted magnetic resonance imaging (PWI) tracks the passage of a bolus of @entity2287 contrast material through brain tissue and is reflective of cerebral blood flow. We describe the characteristics of PWI in @entity1 with @entity7025 and present in detail the PWI findings of a @entity1 studied before and after surgical intervention. CLINICAL PRESENTATION: A 24-year-old @entity1 presented with recurrent @entity385 during a period of 1 year. Angiography disclosed findings consistent with bilateral @entity7025 . PWI showed a striking contrast in perfusion between the anterior and posterior circulations, with relative hyperperfusion in the posterior fossa and marked hypoperfusion in the hemispheric deep white matter. Similar findings are reported in five other @entity1 with @entity7025 . Differences in time-to-peak measurements between the pons and the cerebral hemispheres ranged between 2 and 10 seconds, with the greatest difference seen in the two @entity1 with recurrent @entity64 . INTERVENTION: The @entity1 underwent a left encephalomyosynangiosis. One year later, she showed significant improvement in neurological function, and a repeat PWI study showed marked improvement in perfusion of the left hemisphere. Magnetic resonance imaging confirmed the growth of small vessels into the brain from the surgical site. CONCLUSION: PWI demonstrates characteristic patterns of cerebral perfusion in @entity1 with @entity7025 and documents improved perfusion after successful surgical intervention. Quantitative analysis of the difference of time-to-peak measurements between the anterior and posterior circulation may be a marker of the severity of the disease.
