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Spinal cord central echo complex: histoanatomic correlation.

M D Nelson1, J A Sedler, F H Gilles

  • 1Department of Radiology, Children's Hospital of Los Angeles, CA 90027.

Radiology
|February 1, 1989
PubMed
Summary
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Real-time ultrasound reveals a central spinal cord echo complex. Histoanatomic studies show this echo originates from the anterior median fissure and ventral white commissure, not the central canal.

Area of Science:

  • Neuroimaging
  • Spinal Cord Anatomy
  • Histology

Background:

  • Real-time sonography often shows a central echogenic focus within the spinal cord.
  • This echogenic focus has been traditionally attributed to the central canal.

Purpose of the Study:

  • To identify the precise source of the central echo complex observed in spinal cord sonography.
  • To correlate ultrasound findings with detailed histoanatomic examination.

Main Methods:

  • Ultrasound (US) examination of fresh and fixed cadaver spinal cords.
  • Correlative transverse spinal cord sections stained for cells (hematoxylin-eosin), myelin (Luxol fast blue), and glial fibrils (Holzer stain).

Main Results:

  • The central echo complex is generated by the interface between the myelinated ventral white commissure and the anterior median fissure.

Related Experiment Videos

  • Variations in the echo complex shape correlate with the degree of anterior median fissure flaring.
  • The residual central canal and ependymal cell remnants do not produce the echogenic focus.

    • Conclusions:

    • The central echo complex in spinal sonography is anatomically explained by the anterior median fissure and ventral white commissure.
    • The central canal is not the source of this consistent sonographic finding.