The fetal cerebellar vermis: normal development as shown by transvaginal ultrasound

Authors

  • G. Malinger,

    Corresponding author
    1. Department of Obstetrics and Gynecology, The Edith Wolfson Medical Center, Holon and Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
    • Department of Obstetrics and Gynecology, The Edith Wolfson Medical Center, PO Box 5, Holon 58100, Israel.
    Search for more papers by this author
  • S. Ginath,

    1. Department of Obstetrics and Gynecology, The Edith Wolfson Medical Center, Holon and Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
    Search for more papers by this author
  • T. Lerman-Sagie,

    1. Pediatric Neurology Unit, The Edith Wolfson Medical Center, Holon and Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
    Search for more papers by this author
  • N. Watemberg,

    1. Pediatric Neurology Unit, The Edith Wolfson Medical Center, Holon and Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
    Search for more papers by this author
  • D. Lev,

    1. Genetics Institute, The Edith Wolfson Medical Center, Holon and Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
    Search for more papers by this author
  • M. Glezerman

    1. Department of Obstetrics and Gynecology, The Edith Wolfson Medical Center, Holon and Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
    Search for more papers by this author

Abstract

Objective

To determine the normal appearance and development of the fetal cerebellar vermis using mid-sagittal planes obtained by transvaginal sonography.

Subjects and Methods

A total of 101 fetuses were evaluated by transvaginal sonography between 21 and 39 weeks of gestation. The mid-sagittal antero-posterior and cranio-caudal vermian diameters, circumference and surface area were measured and calculated. Nomograms were produced.

Results

The vermis was observed in 96% of the cases and all the measurements were performed in 92%. The vermis grows in a linear fashion throughout pregnancy. The growth pattern correlates well with gestational age, biparietal diameter, head circumference and transverse cerebellar diameter.

Conclusion

Transvaginal sonography is a valuable tool in the study of the fetal vermis during the second half of pregnancy. Knowledge of its normal appearance may help identify developmental anomalies and enable accurate prenatal counseling. Copyright © 2001 John Wiley & Sons, Ltd.

Ancillary