Gordon Holmes syndrome CTX, AARS2-related leukoencephalopathy CSF1R-related leukoencephalopathy, NIID, FXTAS, CTX, AARS2-related leukoencephalopathy ADLD, NIID, FXTAS, AARS2-related leukoencephalopathy. This evidence concerns the gene AARS2 and fragile X-associated tremor/ataxia syndrome.