Allan-Herndon-Dudley syndrome (AHDS) is caused by mutations in the SLC16A2 gene, encoding for the monocarboxylate transporter 8 (MCT8). Central hypothyroidism and chronic peripheral thyrotoxicosis result in a severe phenotype, mainly characterized by poor growth, intellectual disability, spastic tetraparesis, and movement disorders, including paroxysmal ones (startle reaction and paroxysmal dyskinesias). Seizures are rarely reported.
View Article and Find Full Text PDFJ Intellect Disabil Res
July 2023
Background: Investigating copy number variations (CNVs) such as microdeletions or microduplications can significantly contribute to discover the aetiology of neurodevelopmental disorders. 15q11.2 genomic region, including NIPA1 and NIPA2 genes, contains a recurrent but rare CNV, flanked by the break points BP1 and BP2.
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