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First-trimester neck abnormalities: three-dimensional evaluation

F Bonilla-Musoles1, F Raga, A Villalobos

  • 1Departamento de Obstetricia y Ginecología, Facultad de Medicina, Universidad de Valencia, Spain.

Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine
|July 21, 1998
PubMed
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Ultrasonography can differentiate between nuchal translucency and hygroma colli in fetuses. Hygroma colli shows irregular membranes with bullae, while nuchal translucency has a linear membrane.

Area of Science:

  • Perinatology
  • Medical Imaging
  • Fetal Medicine

Background:

  • Nuchal translucency and hygroma colli are common first-trimester ultrasound findings.
  • Distinguishing between these conditions is crucial for accurate genetic counseling and management.
  • Existing sonographic criteria may not always be definitive.

Purpose of the Study:

  • To identify distinct ultrasonographic features differentiating nuchal translucency from hygroma colli.
  • To evaluate the utility of transvaginal and 3D ultrasonography in this differentiation.
  • To correlate sonographic findings with fetal karyotype results.

Main Methods:

  • Retrospective analysis of 25 fetuses (13 with nuchal translucency, 12 with hygroma colli).
  • Utilized transvaginal and three-dimensional ultrasonography for detailed imaging.

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  • Fetal karyotype was obtained prior to rescanning.

    • Main Results:

    • Hygroma colli cases exhibited bullae, and more irregular, extensive, and amplitude-varying membranes.
    • Nuchal translucency cases presented with a homogeneous, linear membrane.
    • Three-dimensional ultrasonography proved useful, though detailed analysis was limited in 30% of cases.

    Conclusions:

    • Distinct sonographic differences exist between nuchal translucency and hygroma colli.
    • Transvaginal and 3D ultrasonography can aid in differentiating these conditions.
    • Sonographic findings reflect the underlying physiopathologic differences.