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An unusual case of split cord malformation
1Department of Radiology, University of Occupational and Environmental Health, School of Medicine, 1-1 Iseigaoka, Yahatanashi-ku, Kitakyushu 807-8555, Japan. j-moriya@med.uoeh-u.ac.jp
AJNR. American Journal of Neuroradiology
|August 16, 2006
Summary
This study details a rare split cord malformation with spinal dysgenesis. Despite lacking apparent connections, electrical studies confirmed functional pathways between the hemicord and the main spinal cord.
Area of Science:
- Neurology
- Developmental Biology
- Spinal Cord Anatomy
Background:
- Split cord malformation (SCM) is a rare congenital anomaly characterized by the division of the spinal cord.
- Segmental spinal dysgenesis involves incomplete development of vertebral segments, often associated with other spinal malformations.
- Understanding the anatomical and functional integrity of SCM variants is crucial for diagnosis and management.
Observation:
- A unique variant of split cord malformation with coexisting segmental spinal dysgenesis was identified.
- Computed tomography (CT) myelography revealed a left hemicord within an intravertebral cleft, with a minimal subarachnoid space.
- Radiological imaging showed no direct intradural connection between the left hemicord and the upper spinal cord.
Findings:
- Functional electrical stimulation studies demonstrated an intact efferent pathway.
- This pathway successfully connected the isolated left hemicord to the main spinal cord, indicating preserved neurological function.
- The findings challenge assumptions based solely on anatomical visualization in SCM.
Implications:
- This case highlights the importance of functional studies in evaluating spinal cord malformations.
- It suggests that anatomical separation does not always equate to functional disconnection in SCM.
- Further research into such variants could refine diagnostic criteria and treatment strategies for spinal dysgenesis and SCM.