CASE REPORTS
JOURNAL ARTICLE
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Post-Stroke Lingual Dystonia: Clinical Description and Neuroimaging Findings.

Background: Lingual dystonia is extremely rare following stroke. We describe clinical features and neuroimaging findings in a series of 11 patients (seven acute and four chronic) with post-stroke lingual dystonia and review the literature.

Methods: This was a case series using a preformed structured proforma and review of literature using a PubMed search.

Results: In our case series, all patients had dysarthria as a presenting symptom. Seven patients had acute presentation (six had an ischemic infarct and one had thalamic hemorrhage) and four had chronic presentation (all had infarct). All patients except one had small infarcts, with the majority of them in the basal ganglia and subcortical white matter regions. Additional chronic ischemic lesions were seen in all patients with acute presentation. The majority of the patients with acute (five out of seven; 71.42%) presentation had left-sided involvement on imaging. We could identify only one case of acute post-stroke lingual dystonia following the PubMed search. Three other cases of post-stroke lingual dystonia with chronic presentation have been described; however, these were associated with oromandibular or cranial dystonia.

Discussion: Our results, based on brain lesions, suggest that all lingual dystonia patients with acute infarcts had underlying chronic infarcts. Overall, more left-sided than right-sided strokes were observed with post-stroke lingual movement disorders including dystonia; however, the data were not significant (p = 1). All patients had dysarthria, with only one having mild tongue weakness and only four having facial weakness. This suggests that the lingual dystonia was responsible for the dysarthria rather than weakness in these patients.

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