Could a single DNA test solve the mystery of rare brain diseases in kids?

adrenoleukodystrophy adrenomyeloneuropathy adult Refsum disease adult-onset autosomal dominant demyelinating leukodystrophy Aicardi-Goutieres syndrome Aicardi-Goutieres syndrome 1 Alexander disease Alexanders leukodystrophy Allan-Herndon-Dudley syndrome attention deficit hyperactivity disorder, inattentive type Canavan disease cerebral arteriopathy with subcortical infarcts and leukoencephalopathy cerebral arteriopathy, autosomal dominant, with subcortical infarcts and leukoencephalopathy, type 1 cerebrotendinous xanthomatosis Charcot-Marie-Tooth disease Cockayne syndrome free sialic acid storage disease Gangliosidoses gangliosidosis GM2 gangliosidosis hypomyelinating leukodystrophy 2 hypomyelinating leukodystrophy 5 hypomyelinating leukodystrophy 6 hypomyelination with brain stem and spinal cord involvement and leg spasticity Krabbe disease leukodystrophy leukodystrophy, hypomyelinating, 7, with or without oligodontia and/or hypogonadotropic hypogonadism Leukoencephalopathies leukoencephalopathy with brain stem and spinal cord involvement-high lactate syndrome leukoencephalopathy with calcifications and cysts leukoencephalopathy with vanishing white matter leukoencephalopathy, diffuse hereditary, with spheroids 1 megalencephalic leukoencephalopathy with subcortical cysts megalencephalic leukoencephalopathy with subcortical cysts 1 metachromatic leukodystrophy mucopolysaccharidosis mucosulfatidosis neurodegeneration with brain iron accumulation 5 null syndrome Pelizaeus-Merzbacher spectrum disorder Peroxisomal Disorders peroxisome biogenesis disorder Salla disease Sialic Acid Storage Disease Sjogren syndrome Sjogren-Larsson syndrome TUBB4A-related neurologic disorder Zellweger spectrum disorders