Dandy-Walker Variant : Prenatal Diagnosis by Ultrasonography
| Autor: | M Bhatia, BN Chander, A Alam |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
congenital
hereditary and neonatal diseases and abnormalities business.industry fungi Prenatal diagnosis Case Report General Medicine Anatomy medicine.disease Fourth ventricle Hypoplasia Enlarged cisterna magna medicine.anatomical_structure Ventricle medicine Cerebellar vermis Gestation Choledochal cysts business |
| Popis: | The Dandy-Walker complex is a rare congenital intracranial malformation that comprises a spectrum of abnormalities of the posterior fossa which are classified as (a) Dandy-Walker malformation (cystic dilatation of the 4th ventricle, complete or partial agenesis of the cerebellar vermis and an enlarged posterior fossa) (b) Dandy-Walker variant (cystic posterior fossa mass with variable hypoplasia of the cerebellar vermis and no enlargement of the posterior fossa) and (c) Mega-cisterna magna (enlarged cisterna magna with normal cerebellar vermis and fourth ventricle). The prenatal sonographic diagnosis of the classic Dandy-Walker malformation is simple, however the definitive diagnosis of Dandy-Walker variant and Mega-cisterna magna is difficult before 18 weeks of gestation. This is because the sonographic appearance of normal cerebellum in the second trimester can resemble pathological anomalies as the posterior fossa structures are not established until then and the sonologist must exercise caution before reaching a final diagnosis of Dandy-Walker variant or mega-cisterna magna [1]. We report a case of Dandy-Walker variant which was diagnosed during routine antenatal ultrasonography at 22 weeks of gestation and subsequently confirmed by post natal CT scan of the brain. |
| Databáze: | OpenAIRE |
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