ArticleActa neurologica Belgica2024
'The phenotypic conundrum of Trp748Ser variant in POLG gene: a report of two patients'.
Article in Acta neurologica Belgica, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
We present two cases of a 23-years and 32-years old female respectively, who presented with recurrent seizures, ataxia, dysarthria, psychomotor slowing. Magnetic resonance imaging (MRI) of the brain in the first patient revealed T2/FLAIR hyperintensity in the bilateral thalamus and cerebellar white matter with diffusion restriction, with no contrast enhancement. In the second patient, magnetic resonance imaging of brain showed FLAIR hyperintensity in precuneus while CSF showed raised HSV IgG titre on first presentation leading to suspicion of infective etiology. The initial differential diagnosis included autoimmune, metabolic and demyelinating causes. However, routine laboratory investigations, cerebrospinal fluid analysis, and autoimmune panel and demyelination workup were inconclusive. Considering the possibility of a genetic-mediated metabolic disorder, genetic testing was carried out leading to the identification of the Trp748Ser variation in POLG gene associated with mitochondrial DNA depletion syndrome. These cases highlight the diagnostic challenges and complexities in identifying rare metabolic encephalopathy, emphasizing the importance of a multidisciplinary approach in such cases.
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