Dandy Walker malformation

Durandeau*, Cuillier F, MD**

* Echographist,  97400 Saint-Denis ** Department of Gynecology, Félix Guyon'Hospital, 97400 Saint-Denis, Ile de la Réunion, France.

This is a  41-year-old-woman, G4P3, referred to our department at 16 weeks due to a hydrocephaly. In our antenatal unit, we performed a scan and the ultrasound findings were:

  • hydrocephaly, with dilatation of the third ventricle
  • dilatation of the fourth ventricle, with absence of the vermis
  • two cerebellar hemispheres seemed normal

Because the patient had previous three cardiac strokes and the ejection fraction wass only 15%, the mother requested the termination of pregnancy. Amniocentesis was proposed, but not accepted. After delivery, the external analysis of the fetus was normal.

Note the absence of the cerebellar vermis

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Note the hydrocephaly

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