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Supplementary Material for: Concomitant Mosaic Turner Syndrome and Congenital Adrenal Hyperplasia in one of three patients of USP9X variant-associated Autism Spectrum Disorder

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posted on 2025-02-03, 05:39 authored by Güleç A., Gerik-Celebi H.B., Demiral M.
Abstract Introduction: X-Linked Intellectual Developmental Disorder 99 (XLID99) is a rare neurodevelopmental disorder associated with mutations in the USP9X gene. This study reports on three patients diagnosed with autism spectrum disorder (ASD), highlighting novel genetic findings. Case Presentation: Among the three patients, two male siblings exhibited a novel USP9X gene missense variant, while the third, a female, presented a unique deletion of the USP9X gene alongside adrenal insufficiency and mosaic Turner syndrome. This variant has not been reported in public databases and may influence ASD development. Conclusion: This report documents the first instance of a triple diagnosis of XLID99, Turner syndrome, and congenital adrenal hyperplasia. Findings underline the significance of genetic evaluation in ASD for identifying rare and complex diagnoses.

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