WDR81 and Intellectual disability: Pathogenic variants in the WDR81 gene on chromosome 17p13.3 have been linked to cerebellar ataxia, impaired intellectual development, and disequilibrium syndrome-2 (CAMRQ2), a rare disorder characterized by congenital cerebellar ataxia (a condition causing impaired coordination and balance due to cerebellar dysfunction), intellectual disability, and gait abnormalities.