Presentation
Antenatal scan in second trimester.
Patient Data
Age: 26 weeks gestation
Gender: Female
Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.
From the case:
Mega cisterna magna
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Transcerebellar diameter 26 mm.
Cisterna magna >10 mm.
Conclusion: mega cisterna magna.
Case Discussion
Mega cisterna magna is an anatomic variant. Careful assessment of the cerebellar vermis and fourth ventricle is necessary to exclude cerebellar hypoplasia and a Dandy-Walker malformation.