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Journey Through Autosomal-Recessive Spastic Ataxia of Charlevoix–Saguenay: Insights From a Case Series of Seven Patients–A Single-Center Study and Review of an Indian Cohort
Mit Ankur Raval, Vikram V Holla, Nitish Kamble, Gautham Arunachal, Babylakshmi Muthusamy, Jitender Saini, Ravi Yadav, Pramod Kumar Pal
J Mov Disord. 2024;17(4):430-435.   Published online August 29, 2024
DOI: https://doi.org/10.14802/jmd.24154
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AbstractAbstract PDFSupplementary Material
Objective
In this study, we describe the clinical and investigative profiles of 7 cases of autosomal-recessive spastic ataxia of Charlevoix–Saguenay (ARSACS).
Methods
We performed a retrospective chart review of genetically proven cases of ARSACS from our database. Additionally, we reviewed the literature for reported cases of ARSACS from India.
Results
All 7 patients experienced disease onset within the first decade of life. According to the available data, all patients had walking difficulty (7/7), spastic ataxia (7/7), classical neuroimaging findings (7/7), sensory‒motor demyelinating polyneuropathy (6/6), abnormal evoked potentials (5/5), and a thickened retinal nerve fiber layer (3/3). Exome sequencing revealed 8 unique pathogenic/likely pathogenic variants (6 novel) in the SACS gene. An additional 21 cases (18 families) of ARSACS that could be identified from India had similar clinical and investigational findings. The most common c.8793delA variant may have a founder effect.
Conclusion
Our series adds to the previously reported cases of ARSACS from India and expands the genetic spectrum by adding 6 novel variants.

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