Asymmetric ventriculomegaly, interhemispheric cyst and dysgenesis of the corpus callosum (AVID)
Asymmetric ventriculomegaly, interhemispheric cyst, and dysgenesis of the corpus callosum (AVID) is a triad of congenital cerebral anomalies.
Radiographic features
- markedly asymmetric enlargement of the lateral ventricles may be the initial finding on routine fetal morphology ultrasound.
- interhemispheric cyst
- dysgenesis of the corpus callosum
- absent cavum septum pellucidum
- macrocephaly
Associations
Other congenital abnormalities may be present, including Dandy-Walker malformation, grey matter heterotopia or polymicrogyria.
Treatment and prognosis
Variable but generally severe neurologic and developmental delay.
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