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Related Experiment Videos

The fetal head: borderlines

J P McGahan1

  • 1Department of Radiology, University of California, Davis, Medical Center, Sacramento 95817, USA.

Seminars in Ultrasound, CT, and MR
|August 27, 1998
PubMed
Summary
This summary is machine-generated.

Fetal brain ultrasound has limitations in detecting all intracranial malformations, even with normal measurements. Further review of central nervous system embryology and sonographic techniques is needed for precise diagnosis.

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Area of Science:

  • Medical imaging
  • Prenatal diagnosis
  • Neurosonography

Background:

  • Ultrasound examination of the fetal head has been used for over 20 years.
  • Despite advancements, controversies persist regarding the interpretation of fetal brain ultrasound findings.
  • Certain intracranial malformations can occur with seemingly normal ventricular atrial measurements.

Purpose of the Study:

  • To review current literature and address controversies in fetal brain ultrasound.
  • To improve the detection of posterior fossa abnormalities, including Dandy-Walker variant.
  • To provide guidance on managing fetuses with choroid plexus cysts.

Main Methods:

  • Review of existing scientific literature on fetal central nervous system sonography.
  • Analysis of diagnostic challenges in identifying subtle intracranial malformations.

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  • Discussion of technical pitfalls and anatomical variations in fetal neurosonography.

    • Main Results:

    • Ventricular atrium size and posterior fossa measurements are generally stable but may not detect all abnormalities.
    • Obvious posterior fossa defects like Dandy-Walker malformation are detectable, but variants can be missed.
    • Management of fetuses with choroid plexus cysts remains an area requiring further clarification.

    Conclusions:

    • Accurate fetal central nervous system diagnosis requires understanding embryology, sonographic limitations, and normal/abnormal anatomical overlap.
    • Further research and standardized guidelines are necessary for managing complex fetal brain anomalies.
    • Improved diagnostic precision in fetal neurosonography is crucial for optimal prenatal care.