Fetal intracranial cystic lesions can arise from a number of pathologies, including:
Non-tumourous
- fetal arachnoid cyst
- fetal choroid plexus cyst
- fetal connatal cyst
- fetal porencephalic cyst
- fetal interhemispheric cyst
- fetal subependymal cyst
- dorsal cyst of holoprosencephaly
- Blake pouch cyst
- mega cisterna magna
- multicystic encephalomalacia
- cysts associated with periventricular leukomalacia
- cysts associated with inborn errors of metabolism
- Zellweger syndrome: periventricular pseudocysts
- holocarboxylase synthase deficiency 5
Tumourous
Mimickers of intracranial cysts
- fetal hydrocephalus
- hydranencephaly
- intra-cranial arteriovenous malformations
Associated conditions
- Aicardi syndrome
- agenesis of the corpus callosum: for fetal interhemispheric cysts
- Dandy-Walker continuum
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