Symptoms vary according to the abnormality, but often feature poor muscle tone and motor function, seizures, developmental delays, mental retardation, failure to grow and thrive, difficulties with feeding, swelling in the extremities, and a smaller than normal head. Most infants with an<unk>  appear normal, but some disorders have characteristic facial or skull features that can be recognized by a neurologist.
Neuronal migration disorder
Developmental regression
Peroxisomal disorder
Cranio-lenticulo-sutural dysplasia
Developmental disorder
Neuroectodermal neoplasm
Caudal regression syndrome
Trinucleotide repeat disorder