Prognostic Observation of Posterior Reversible Encephalopathy Syndrome

Plain-language summary

Posterior Reversible Encephalopathy Syndrome (PRES) is a clinical-radiological entity, which is associated with a variety of clinical conditions. The imaging and clinical findings are typically reversible, but many patients still have permanent neurological sequelae with a fatal outcome. Up to now there are no consistent conclusions about the factors that affecting its prognosis. The objective of our study is to discuss the effects of different causes, different imaging findings and laboratory parameters on the prognosis of PRES and deepen the understanding of the nature of PRES. This will contribute to predict the prognosis of patients with PRES and to further investigate the pathogenesis of PRES so as to guide the clinical treatment and follow-up evaluation. A multi-center retrospective case study will be performed from January 2016 to July 2017 and a total of 400 patients who meet the criteria for PRES diagnosis from 10 sub-centers are anticipated included in this research. Patients will be divided into several subgroups according to the etiology. Date will be collected from the clinical records，imaging and laboratory data of the patients, including demographic data, clinical data, imaging findings, laboratory parameters and follow-up data. During the follow-up, MRI and blood biochemical examination will be performed once more. The imaging findings of the patients will be assessed by two neuroimaging physicians, any difference between them will be agreed upon by consensus. Prognosis of the patients will be assessed by using the modified Rankin scale (mRS) scores. All of the above data is saved into the database. In this study we will review etiologies and imaging findings, laboratory and follow-up data of the patients we selected. Univariate and multivariate analysis will be performed within the group and between groups according to the subgroups. Then we will discuss the connection between different causes, different imaging findings and laboratory parameters and the prognosis of posterior reversible encephalopathy syndrome.

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