Which condition is characterized by venous malformations affecting the leptomeninges of the cerebral cortex?

Explanation

Sturge-Weber syndrome is distinguished by venous malformations involving the leptomeninges of the cerebral cortex. This feature is not present in Rendu-Osler-Weber disease (hereditary hemorrhagic telangiectasia), Maffucci syndrome, or angioosteohypertrophy syndrome.