Case challenge · Imaging / Fetal medicine / Prenatal diagnosis · teaching

Fetal Posterior Fossa Malformation MRI (Dandy-Walker Continuum) · case challenge

Given a case, work through the care pathway step by step; the tool checks each choice and scores you. Decisions and basis are taken from this site's reviewed care pathways.

← View the full flowchartBased on Fetal posterior fossa MRI

Case #1Imaging / Fetal medicine / Prenatal diagnosis

📋 Case data

Posterior fossa MRI (vermis + tegmento-vermian angle)Vermian hypoplasia/agenesis + cystic fourth ventricle dilation + elevated tentorium + enlarged posterior fossa

Data is taken from this pathway's reviewed node text. Work through the pathway step by step.

Step 1 / 1 · Posterior fossa MRI (vermis + tegmento-vermian angle)

Posterior fossa MRI (vermis + tegmento-vermian angle, midsagittal/coronal)?

💡 Assess the vermis on midsagittal/coronal, the hemispheres on axial/coronal. Key measurement: an increased tegmento-vermian angle (normal ~0–9 degrees) indicates vermian rotation/hypoplasia.

For teaching. Decisions and their basis are taken from this site's reviewed care pathways; for licensed clinicians/trainees, this does not replace clinical judgment or local protocols.