Prenatal investigations make it possible to follow up malformative intracranial cysts from their detection in utero through the postnatal period. By including those that will remain silent postnatally, precious information can be provided about their real natural history.
Department of Pediatric Neurosurgery, Groupe Hospitalier Necker-Enfants Malades, 149 rue de Sèvres, 75743 Paris Cedex 15, France. alain.kahn@nck.ap-hop-paris.fr