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Vermian Dysgenesis
Anne Kennedy, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Clinical Issues

          • Diagnostic Checklist

            TERMINOLOGY

            • Definitions

              • Partial dysgenesis or complete agenesis of cerebellar vermis

            IMAGING

            • General Features

              • Ultrasonographic Findings

                • MR Findings

                  • Imaging Recommendations

                    DIFFERENTIAL DIAGNOSIS

                      PATHOLOGY

                      • General Features

                        CLINICAL ISSUES

                        • Natural History & Prognosis

                          • Treatment

                            DIAGNOSTIC CHECKLIST

                            • Image Interpretation Pearls

                              Selected References

                              1. Altmann R et al: Diagnosis of fetal posterior fossa malformations in high-risk pregnancies at 12-14 gestational weeks by transvaginal ultrasound examination. Fetal Diagn Ther. 47(3):182-7, 2020
                              2. Mckinnon K et al: Biometric assessments of the posterior fossa by fetal MRI: a systematic review. Prenat Diagn. 41(2):258-70, 2020
                              3. Rüsch CT et al: Pontocerebellar hypoplasia: a pattern recognition approach. Cerebellum. 19(4):569-82, 2020
                              4. Haratz KK et al: Fourth ventricle index: sonographic marker for severe fetal vermian dysgenesis/agenesis. Ultrasound Obstet Gynecol. 53(3):390-5, 2019
                              5. Paladini D et al: Hindbrain morphometry and choroid plexus position in differential diagnosis of posterior fossa cystic malformations. Ultrasound Obstet Gynecol. 54(2):207-14, 2019
                              6. Pertl B et al: The fetal posterior fossa on prenatal ultrasound imaging: normal longitudinal development and posterior fossa anomalies. Ultraschall Med. 40(6):692-721, 2019
                              7. Chapman T et al: Establishment of normative values for the fetal posterior fossa by magnetic resonance imaging. Prenat Diagn. 38(13):1035-41, 2018
                              8. Wüest A et al: Enlarged posterior fossa on prenatal imaging: differential diagnosis, associated anomalies and postnatal outcome. Acta Obstet Gynecol Scand. 96(7):837-43, 2017
                              9. Robinson AJ: Inferior vermian hypoplasia--preconception, misconception. Ultrasound Obstet Gynecol. 43(2):123-36, 2014
                              10. Patek KJ et al: Posterior fossa anomalies diagnosed with fetal MRI: associated anomalies and neurodevelopmental outcomes. Prenat Diagn. 32(1):75-82, 2012
                              Related Anatomy
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                              Related Differential Diagnoses
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                              References
                              Tables

                              Tables

                              KEY FACTS

                              • Terminology

                                • Imaging

                                  • Top Differential Diagnoses

                                    • Clinical Issues

                                      • Diagnostic Checklist

                                        TERMINOLOGY

                                        • Definitions

                                          • Partial dysgenesis or complete agenesis of cerebellar vermis

                                        IMAGING

                                        • General Features

                                          • Ultrasonographic Findings

                                            • MR Findings

                                              • Imaging Recommendations

                                                DIFFERENTIAL DIAGNOSIS

                                                  PATHOLOGY

                                                  • General Features

                                                    CLINICAL ISSUES

                                                    • Natural History & Prognosis

                                                      • Treatment

                                                        DIAGNOSTIC CHECKLIST

                                                        • Image Interpretation Pearls

                                                          Selected References

                                                          1. Altmann R et al: Diagnosis of fetal posterior fossa malformations in high-risk pregnancies at 12-14 gestational weeks by transvaginal ultrasound examination. Fetal Diagn Ther. 47(3):182-7, 2020
                                                          2. Mckinnon K et al: Biometric assessments of the posterior fossa by fetal MRI: a systematic review. Prenat Diagn. 41(2):258-70, 2020
                                                          3. Rüsch CT et al: Pontocerebellar hypoplasia: a pattern recognition approach. Cerebellum. 19(4):569-82, 2020
                                                          4. Haratz KK et al: Fourth ventricle index: sonographic marker for severe fetal vermian dysgenesis/agenesis. Ultrasound Obstet Gynecol. 53(3):390-5, 2019
                                                          5. Paladini D et al: Hindbrain morphometry and choroid plexus position in differential diagnosis of posterior fossa cystic malformations. Ultrasound Obstet Gynecol. 54(2):207-14, 2019
                                                          6. Pertl B et al: The fetal posterior fossa on prenatal ultrasound imaging: normal longitudinal development and posterior fossa anomalies. Ultraschall Med. 40(6):692-721, 2019
                                                          7. Chapman T et al: Establishment of normative values for the fetal posterior fossa by magnetic resonance imaging. Prenat Diagn. 38(13):1035-41, 2018
                                                          8. Wüest A et al: Enlarged posterior fossa on prenatal imaging: differential diagnosis, associated anomalies and postnatal outcome. Acta Obstet Gynecol Scand. 96(7):837-43, 2017
                                                          9. Robinson AJ: Inferior vermian hypoplasia--preconception, misconception. Ultrasound Obstet Gynecol. 43(2):123-36, 2014
                                                          10. Patek KJ et al: Posterior fossa anomalies diagnosed with fetal MRI: associated anomalies and neurodevelopmental outcomes. Prenat Diagn. 32(1):75-82, 2012