Enlarged posterior fossa (PF) due to elevation of cerebellar tentorium and torcular of Herophili
Dandy-Walker continuum: Abandoned term encompassing spectrum of PF findings
Distinctions between PF abnormalities can be subtle
Aim for maximum precision as very different prognostic implications
IMAGING
General Features
Ultrasonographic Findings
MR Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Reporting Tips
Selected References
AIUM practice parameter for the performance of detailed diagnostic obstetric ultrasound examinations between 12 weeks 0 days and 13 weeks 6 days. J Ultrasound Med. 40(5):E1-16, 2021
Garcia-Rodriguez R et al: First-trimester cystic posterior fossa: reference ranges, associated findings, and pregnancy outcomes. J Matern Fetal Neonatal Med. 1-10, 2019
Morton CC et al: The Impact of Prenatal Diagnosis of Selected Central Nervous System Anomalies for Prenatal Counselling Based on Significant Pregnancy Morbidity and Neonatal Outcomes. J Obstet Gynaecol Can. 41(2):166-173.e1, 2019
Paladini D et al: Differentiating features of posterior fossa at 12-13 weeks' gestation in fetuses with Dandy-Walker malformation and Blake's pouch cyst. Ultrasound Obstet Gynecol. 53(6):850-852, 2019
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
Chapman T et al: Establishment of normative values for the fetal posterior fossa by magnetic resonance imaging. Prenat Diagn. 38(13):1035-41, 2018
Martinez-Ten P et al: Non-visualization of choroid plexus of fourth ventricle as first-trimester predictor of posterior fossa anomalies and chromosomal defects. Ultrasound Obstet Gynecol. 51(2):199-207, 2018
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
Bernardo S et al: Dandy-Walker Malformation: is the 'tail sign' the key sign? Prenat Diagn. 35(13):1358-64, 2015
Chapman T et al: Diagnostic imaging of posterior fossa anomalies in the fetus and neonate: part 2, posterior fossa disorders. Clin Imaging. 39(2):167-75, 2015
Ghali R et al: Perinatal and short-term neonatal outcomes of posterior fossa anomalies. Fetal Diagn Ther. 35(2):108-17, 2014
Leibovitz Z et al: Fetal posterior fossa dimensions: normal and anomalous development assessed in mid-sagittal cranial plane by three-dimensional multiplanar sonography. Ultrasound Obstet Gynecol. 43(2):147-53, 2014
Enlarged posterior fossa (PF) due to elevation of cerebellar tentorium and torcular of Herophili
Dandy-Walker continuum: Abandoned term encompassing spectrum of PF findings
Distinctions between PF abnormalities can be subtle
Aim for maximum precision as very different prognostic implications
IMAGING
General Features
Ultrasonographic Findings
MR Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Reporting Tips
Selected References
AIUM practice parameter for the performance of detailed diagnostic obstetric ultrasound examinations between 12 weeks 0 days and 13 weeks 6 days. J Ultrasound Med. 40(5):E1-16, 2021
Garcia-Rodriguez R et al: First-trimester cystic posterior fossa: reference ranges, associated findings, and pregnancy outcomes. J Matern Fetal Neonatal Med. 1-10, 2019
Morton CC et al: The Impact of Prenatal Diagnosis of Selected Central Nervous System Anomalies for Prenatal Counselling Based on Significant Pregnancy Morbidity and Neonatal Outcomes. J Obstet Gynaecol Can. 41(2):166-173.e1, 2019
Paladini D et al: Differentiating features of posterior fossa at 12-13 weeks' gestation in fetuses with Dandy-Walker malformation and Blake's pouch cyst. Ultrasound Obstet Gynecol. 53(6):850-852, 2019
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
Chapman T et al: Establishment of normative values for the fetal posterior fossa by magnetic resonance imaging. Prenat Diagn. 38(13):1035-41, 2018
Martinez-Ten P et al: Non-visualization of choroid plexus of fourth ventricle as first-trimester predictor of posterior fossa anomalies and chromosomal defects. Ultrasound Obstet Gynecol. 51(2):199-207, 2018
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
Bernardo S et al: Dandy-Walker Malformation: is the 'tail sign' the key sign? Prenat Diagn. 35(13):1358-64, 2015
Chapman T et al: Diagnostic imaging of posterior fossa anomalies in the fetus and neonate: part 2, posterior fossa disorders. Clin Imaging. 39(2):167-75, 2015
Ghali R et al: Perinatal and short-term neonatal outcomes of posterior fossa anomalies. Fetal Diagn Ther. 35(2):108-17, 2014
Leibovitz Z et al: Fetal posterior fossa dimensions: normal and anomalous development assessed in mid-sagittal cranial plane by three-dimensional multiplanar sonography. Ultrasound Obstet Gynecol. 43(2):147-53, 2014