title: Quantitative Evaluation of the Fetal Cerebellar Vermis Using the Median View on Two-Dimensional Ultrasound.
abstract: BACKGROUND
  Evaluation of the cerebellum and vermis is one of the integral parts of the fetal cranial anomaly screening.
  
  
  OBJECTIVE
  The aim of this study was to create a nomogram for fetal vermis measurements between 17 and 30 gestational weeks.
  
  
  METHODS
  This prospective study was conducted on 171 volunteer pregnant women between March 2013 and December 2014. Measurements of the fetal cerebellar vermis diameters in the sagittal plane were performed by two-dimensional transabdominal ultrasonography.
  
  
  RESULTS
  Optimal median planes were obtained in 117 of the cases. Vermian diameters as a function of gestational age were expressed by regression equations and the correlation coefficients were found to be highly statistically significant (P < 0.001). The normal mean (± standard deviation) for each gestational week was also defined.
  
  
  CONCLUSIONS
  This study presents the normal range of the two-dimensional fetal vermian measurements between 17 and 30 gestational weeks. In the absence of a three-dimensional ultrasonography, two-dimensional ultrasonography could also be used confidently with more time and effort.
authors.affiliation: Department of Obstetrics and Gynecology, Izmir Tepecik Training and Research Hospital, Izmir, Turkey.
authors.forename: Cenk
authors.initials: C
authors.lastname: Gezer
authors.affiliation: Department of Obstetrics and Gynecology, Izmir Tepecik Training and Research Hospital, Izmir, Turkey.
authors.forename: Atalay
authors.initials: A
authors.lastname: Ekin
authors.affiliation: Department of Radiology, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey.
authors.forename: Naciye
authors.initials: N
authors.lastname: Sinem Gezer
authors.affiliation: Department of Obstetrics and Gynecology, Izmir Tepecik Training and Research Hospital, Izmir, Turkey.
authors.forename: Ulas
authors.initials: U
authors.lastname: Solmaz
authors.affiliation: Department of Obstetrics and Gynecology, Izmir Tepecik Training and Research Hospital, Izmir, Turkey.
authors.forename: Mehmet
authors.initials: M
authors.lastname: Ozeren
keywords: Cerebellum; Fetus; Prenatal Diagnosis; Ultrasound; Vermis