Although rare in childhood, stroke may have a serious impact when it happens in this stage of life. Also, it may be the first sign of a systemic disease. We report 12 cases of patients with stroke treated in the Neuropediatrics Unit of Hospital de Clínicas de Porto Alegre (HCPA) from March 1997 to March 2000. All patients, from term infants to 12-year-old children hospitalized in the Pediatrics Unit of HCPA, had clinical suspicion of stroke, which was later confirmed by radiological studies. Patient follow up ranged from 1 to 6 years (mean = 3.4 years). Presenting symptoms were hemiparesis in 9 patients, seizures in 7, deviation of labial commissure in 3, and loss of consciousness in 1. The increase in the number of cases of childhood stroke identified and later confirmed by noninvasive methods had helped in the determination of different ethiologies of stroke: the most frequent being hematologic, cardiac and genetic diseases. However, our study included 6 newborns with stroke whose ethiology was not identified. Seven children with seizures received phenobarbital. Six term infants had neonatal seizures secondary to stroke and restricted to the first 72 hours of life.
-Biochemical markers have played an increasingly relevant role in the assessment of neonatal asphyxia. The S100B protein is particularly important in re s e a rch conducted in this field. The purpose of this study was to underline the importance of the S100B protein in the assessment of term newborn infants with hypoxic-ischemic encephalopathy, as well as to relate it to other substances also involved in the ischemic p rocess. An assessment was made from September 2003 to October 2004 of 21 term newborn infants who developed hypoxic-ischemic encephalopathy. Samples were collected on the 1 s t and 4 t h day of life and S100B p rotein and lactate concentrations were calculated using the immune cytochemical method. A positive relationship was found between the two substances. Additionally, a comparison between the two substances showed a statistically significant correlation.KEY WORDS: S100B, hypoxic-ischemic encephalopathy, newborn, asphyxia.Relação da proteína S100B com a hipóxia neonatal RESUMO -A participação de marcadores bioquímicos na avaliação de quadros de asfixia neonatal é cada vez mais relevante. A proteína S100B é de particular importância neste campo. O objetivo deste estudo foi procurar destacar a importância da proteína S100B na avaliação de recém-nascidos a termo com quadro de encefalopatia hipóxico-isquêmica, assim como correlacionar com outras substâncias que também participam do processo isquêmico. Foram analisados 21 casos de recém nascidos a termo que desenvolveram encefalopatia hipóxico-isquêmica no período de setembro de 2003 a outubro de 2004. Realizadas coletas no 1º e 4º dia de vida e dosadas, por método imunocitoquímico, a proteína S100B e o lactato. Observouse correlação positiva entre as duas substâncias, assim como quando comparadas entre si nas suas respectivas dosagens, obteve-se significância estatística. PALAVRAS-CHAVE: S100B, encefalopatia hipóxico-isquêmica, recém-nascido, asfixia.
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