Background: Post-encephalopathic epilepsy (PEE) is a serious complication of acute encephalopathy syndromes, and is more frequent in patients with acute encephalopathy with biphasic seizures and late reduced diffusion (AESD) than in children with acute encephalopathy. However, a risk factor analysis using laboratory findings in the acute phase of AESD has not yet been performed. Therefore, the present study examined risk factors of AESD-related PEE using laboratory parameters in the acute phase of AESD.
Methods: We retrospectively screened 27 pediatric patients with AESD for inclusion, and enrolled 20 ("the PEE group", n = 6; "the non-PEE group", n = 14) according to inclusion criteria.
Results: The incidence of AESD-related PEE was 30 %, and the median duration from the onset of AESD to the development of PEE was 2.5 months (range, 1-32). The most common types of seizures were focal seizures, epileptic spasms, and startle seizures: 4 out of 6 patients (66.7 %) had intractable epilepsy. The median values of alanine aminotransferase (ALT) in the 1st and 2nd seizure phases of AESD and aspartate aminotransferase (AST) in the 2nd seizure phase were significantly higher in the PEE group than in the non-PEE group (p < 0.01).
Conclusions: This is the first study to report higher serum levels of ALT and AST at the onset of AESD as risk factors for AESD-related PEE. We also provided a detailed description on the clinical characteristics on AESD-related PEE, which are consistent with previous findings.
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