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A Case of Brainstem Variant of Reversible Posterior Leukoencephalopathy Syndrome Masahito KAWABORI 1 , Junichi MURATA 2 , Satoru ABE 2 , Hisatoshi SAITO 2 1Department of Neurosurgery,Hokkaido University Graduate School of Medicine 2Sapporo Azabu Neurosurgical Hospital Keyword: brain stem , reversible posterior leukoencephalopathy syndrome , hypertension , magnetic resonance imaging pp.1105-1109
Published Date 2009/11/10
DOI https://doi.org/10.11477/mf.1436101055
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 A rare case of a brainstem variant of reversible posterior leukoencephalopathy syndrome (RPLS) is reported. A 34-year-old man with a past history of untreated chronic renal failure and hypertension was admitted to our hospital complaining of severe nuchal headache lasting for about four days. His neurological examination was normal, however physical examination revealed his blood pressure was 216/120mmHg. Computed tomography imaging (CT) showed his brain stem with a low attenuation. Magnetic resonance imaging (MRI) revealed extensive hyperintensity and enlargement of the midbrain and pons on T2 weighted and fluid attenuated inversion-recovery (FLAIR) image. However, there was no abnormal lesion seen in either bilateral occipital lobe. Diffusion-weighted image (DWI) was normal at the brainstem, but apparent diffusion coefficient (ADC) values were slightly elevated at the left midbrain. There was no contrast enhancement. His symptom and radiological finding improved soon after his blood pressure was controlled. A repeated MRI taken two weeks later showed complete resolution of the lesion.

 RPLS associated with predominant involvement of the brainstem and sparing of the supratentorial region is rare,but it should be differentiated from brain stem infarction,pontine glioma,central pontine myelinolysis and infective encephalitis,since the neulological consequences are potentially fully reversible after adequate and prompt treatment.


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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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