_:vb50947041 . _:vb50947041 "A cerebral degeneration characterized by dysfunction of the white matter of the brain."^^ . _:vb50947041 . _:vb50947041 . _:vb50947041 . _:vb50947041 "url:http://en.wikipedia.org/wiki/Leukodystrophy"^^ . _:vb50947041 .