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Ultrasonographic features of the normal filum terminale

Myoungae Kwon1, Bo-Kyung Je1, Doran Hong1

  • 1Department of Radiology, Ansan Hospital, Korea University College of Medicine, Ansan, Korea.

Ultrasonography (Seoul, Korea)
|July 25, 2017
PubMed

Insights

Ultrasonography (US) can identify the normal filum terminale (FT) in infants. Hyperechoic marginal echogenicity and transverse US views are key features for distinguishing the FT from surrounding nerve roots.

Area of Science:

  • Pediatric imaging
  • Neurosonography
  • Spinal anatomy

Background:

  • The filum terminale (FT) is a crucial anatomical structure.
  • Advances in ultrasonography (US) necessitate updated imaging feature descriptions.

Purpose of the Study:

  • To re-establish ultrasonography (US) features of the normal filum terminale (FT) in infants.
  • To correlate US findings with anatomical characteristics of the FT.

Main Methods:

  • Retrospective review of 30 spinal US scans (video clips).
  • Assessment of FT internal structure and marginal echogenicity.
  • Comparison of transverse and longitudinal US views for FT visualization.

Main Results:

  • A central echogenic line was identified in 60% of normal FTs.
  • Marginal echogenicity was hyperechoic (27%) or isoechoic (73%) compared to the cauda equina.
  • Transverse US was superior for differentiating the FT in 60% of cases.

Conclusions:

  • The central canal of the FT is visualized on US in 60% of normal infants.
  • Hyperechoic marginal echogenicity aids in FT identification.
  • Transverse US views are valuable for distinguishing the normal FT from nerve roots.
Abstract

Keywords:
Cauda equinaInfant, newbornSpinal cordUltrasonography

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