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The normal conus medullaris: CT criteria for recognition
Radiology
|June 1, 1984
Summary
This study defines the typical CT appearance of the conus medullaris (the terminal part of the spinal cord). Understanding normal dimensions and configuration is crucial for diagnosing spinal cord abnormalities.
Area of Science:
- Radiology
- Neuroimaging
- Anatomy
Background:
- Accurate assessment of the conus medullaris on CT scans is essential for diagnosing spinal pathologies.
- Establishing normal parameters is key for identifying deviations.
Purpose of the Study:
- To determine the normal configuration and dimensions of the conus medullaris using computed tomography (CT).
- To correlate CT findings with anatomical sections in cadavers for validation.
Main Methods:
- CT scans of 30 patients without clinical evidence of conus compression were analyzed.
- CT data was compared with anatomical dissections of cadavers.
Main Results:
- The normal conus medullaris on CT typically presents an oval shape with an anterior sulcus and posterior promontory.
- Normal anteroposterior diameter ranged from 5-8 mm; transverse diameter ranged from 8-11 mm.
- Intramedullary processes were found to alter both the dimensions and configuration of the conus.
Conclusions:
- This study provides reference values for the normal CT appearance of the conus medullaris.
- Deviations from these normal parameters on CT may indicate intramedullary pathology.