HTT and Neurodevelopmental delay: This comparison revealed that only 3 out of the 83 genes overlapped with the SFARI genes (LAS1L, PHF14, and SLC6A1), and only 7 genes matched the Genomics England NDD/Autism panel genes (HTT, LAS1L, MYO7A, PHF14, PRRT2, SLC6A1, XYLT1).