Diagnostic imaging of posterior fossa anomalies in the fetus and neonate: part 2, Posterior fossa disorders

Clin Imaging. 2015 Mar-Apr;39(2):167-75. doi: 10.1016/j.clinimag.2014.10.012. Epub 2014 Oct 22.


This second portion of a two-part review illustrates examples of posterior fossa disorders detectable on prenatal ultrasound and MRI, with postnatal or pathology correlation where available. These disorders are discussed in the context of an anatomic classification scheme described in Part 1 of this posterior fossa anomaly review. Assessment of the size and formation of the cerebellar hemispheres and vermis is critical. Diagnoses discussed here include arachnoid cyst, Blake's pouch cyst, Dandy-Walker malformation, vermian agenesis, Joubert syndrome, rhombencephalosynapsis, Chiari II malformation, ischemia, and tumors.

Keywords: Cerebellum; Congenital brain malformation; Posterior fossa; Prenatal imaging.

Publication types

  • Review

MeSH terms

  • Brain Diseases / diagnosis*
  • Brain Diseases / diagnostic imaging
  • Brain Diseases / pathology
  • Cerebellum / diagnostic imaging
  • Cerebellum / pathology
  • Cranial Fossa, Posterior / diagnostic imaging*
  • Cranial Fossa, Posterior / pathology*
  • Humans
  • Infant, Newborn
  • Magnetic Resonance Imaging / methods
  • Prenatal Diagnosis
  • Ultrasonography