title: [Differential diagnosis of Dandy-Walker syndrome different presentations].
abstract: OBJECTIVE
  Dandy-Walker syndrome is a set of abnormalities of the posterior fossa including three modalities: classic Dandy-Walker malformation, Dandy-Walker variant and mega-cisterna magna. Our objective is clarify the differential diagnosis among these entities.
  
  
  METHODS
  Descriptive and retrospective study of Dandy-Walker cases diagnosed at our Department during the last five years plus a review of the related Medical literature.
  
  
  RESULTS
  Three cases of Dandy-Walker modalities are reported: one case of classic Dandy-Walker malformation, one case of Dandy-Walker variant, and one case of false Dandy-Walker. In the first two cases the patients underwent legal abortion, whereas in the last one a healthy male newborn was delivered in the week 38 of gestation.
  
  
  CONCLUSIONS
  Malformations in the posterior fossa, including Dandy-Walker syndrome, are still a challenge in prenatal diagnosis. Technical developments in imaging, such as in three-dimensional sonography and magnetic resonance, allow higher resolution and multiplanar images for an easier diagnose. There is a high rate of false positive, particularly before the 18th week of gestation. It is advisable not to establish a final diagnose before that week.
authors.affiliation: Servicio de Obstetricia y Ginecología, Hospital Universitario La Paz, Madrid, España.
authors.forename: Pablo
authors.initials: P
authors.lastname: Tobías-González
authors.forename: Mar
authors.initials: M
authors.lastname: Gil Mira
authors.forename: Javier
authors.initials: J
authors.lastname: Valero de Bernabé
authors.forename: Ignacio
authors.initials: I
authors.lastname: Zapardiel
mesh_terms: D000328:Adult; D003616:Dandy-Walker Syndrome / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D012189:Retrospective Studies