Movement disorders in Megalencephalic Leukoencephalopathy with subcortical cysts - A case series.

Background: Megalencephalic leukoencephalopathy with subcortical cysts (MLC) has been described in the literature mostly as early-onset leukodystrophy with cerebellar ataxia being the main clinical phenotype. However, other associated movement disorders have also been reported discretely.

Cases: Here, we present seven cases of MLC. Cerebellar ataxia was common in them, while dystonia was present in six, parkinsonism in one and stereotypy in two. Six of them, belonging to the Agarwal community, had the common c.135dup variant.

Conclusion: Our observation highlights the presence of movement disorders in MLC beyond cerebellar ataxia and phenotypic variability of the c.135dup variant, prevalent in the Agarwal community.