ABSTRACT
AETIOLOGY It has recently been established that the great majority of Williams syndrome cases occur as a result of a microdeletion on the long arm of chromosome 7, almost always involving the elastin gene (ELN).
AETIOLOGY It has recently been established that the great majority of Williams syndrome cases occur as a result of a microdeletion on the long arm of chromosome 7, almost always involving the elastin gene (ELN).