* 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:
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hydrocephaly, with dilatation of the third ventricle
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dilatation of the fourth ventricle, with absence of the vermis
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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