RT - Journal Article T1 - Early Onset of Fragile X Associated Tremor and Ataxia Syndrome: A Case Report from Iran JF - gums-cjns YR - 2021 JO - gums-cjns VO - 7 IS - 3 UR - http://cjns.gums.ac.ir/article-1-443-en.html SP - 180 EP - 183 K1 - Fragile X syndrome K1 - Tremor K1 - Ataxia AB - Background: Different alleles of Fragile X Mental Retardation1 (FMR1) gene with separate molecular etiologies cause Fragile X Syndrome (FXS) and Fragile X-associated Tremor and Ataxia Syndrome (FXTAS). Premutation alleles with 55 to 200 repeats in the FMR1 gene lead to FXTAS. It is carried by 1 in 209 women and 1 in 430 men. FXTAS commonly appears in 50- to 70-year-old adults. Case Presentation: An 11 months old boy was referred to the hospital due to clinical presentations of productive cough seizure, mental disability, and ataxia. Magnetic Resonance Imaging (MRI), Electroencephalography (EEG), hematology, biochemistry, hormone, and genetic tests were done. Triplet repeat PCR (TP PCR) showed 99 CGG repeats as permutation alleles. Conclusion: In this study, the authors reported the early onset of FXTAS in an 11 months old boy for the first time. LA eng UL http://cjns.gums.ac.ir/article-1-443-en.html M3 10.32598/CJNS.7.25.8 ER -