Comparative Study
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Posterior Reversible Encephalopathy Syndrome: A Comparative Study of Pediatric Versus Adult Patients.

Pediatric Neurology 2016 December
BACKGROUND: Posterior reversible encephalopathy syndrome (PRES) is an acute neurotoxic syndrome that, although characteristically reversible, can result in long-term disability. Our aim was to identify the clinical and radiological factors that are unique to children with PRES compared with adults with the syndrome in a single center.

METHODS: We retrospectively reviewed the clinical and radiological records of all patients with PRES admitted at a tertiary care medical center from 2007 to 2014. All patients who met the clinical and radiological criteria for PRES were dichotomized into children (less than 18 years) and adults (18 years or older) based on their age groups, and comparison of their baseline variables, clinical, laboratory, and imaging features was performed.

RESULTS: During this study period, 19 pediatric patients and 100 adult patients with PRES were identified. On univariate analysis, factors significantly associated with pediatric patients with the syndrome were multiorgan failure (84.2% vs 50%, P = 0.006), temporal lobe involvement (63.3% vs 39%, P = 0.04), restricted diffusion (42.1% vs 18%, P = 0.02), and less likelihood of cerebellar involvement (21.1% vs 57%, P = 0.004). On bivariate logistic regression analysis, all these factors remained significantly associated with pediatric PRES; multiorgan failure (odds ratio: 5.80, 95% confidence interval: 1.45 to 29.41, P = 0.03), temporal lobe involvement (odds ratio: 5.08, 95% confidence interval: 1.17 to 22.17, P = 0.03), restricted diffusion (odds ratio: 2.48, 95% confidence interval: 1.61 to 10.10, P = 0.02), and less likely to have cerebellar involvement (odds ratio: 0.08, 95% confidence interval: 0.002 to 0.39, P = 0.002).

CONCLUSIONS: Factors unique to PRES in children compared with adults include a greater propensity with multi-organ failure, involvement of the temporal lobe, and restricted diffusion on imaging.

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