Classify spinal cord lesions as extradural,
intradural-extramedullary and intradural intramedullary based on imaging characteristics. Identify the common locations of the various intrameduallry lesions. Formulate a differential diagnosis based on the location within the spinal cord,
the length of the involved segment,
the enhancement pattern,
and the presence or absence of a cystic component. Recognize the imaging characteristics of the various intramedullary lesions.
The spinal cord begins as a continuation of the medulla oblongata and extends to the conus medullaris. In adults,
the tip of the conus typically terminates at L1-L2,
however it may terminate as high as mid-T12 or as low as L2-L3. The cord has two enlargements: the cervical enlargement,
which extends from C4 to T1 and the lumbosacral enlargement,
which extends from T11 to L1. These enlargements correspond to the locations in the cord that supply the spinal nerves to the upper and lower...
Findings and procedure details
Approach to spinal cord lesions 1) Location within the cord: 2) Short or long segment involvement: In MS there is typically a short segment involved,
less than 2 segments. In other diseases like Transverse Myelitis ortumors,
there is usually a long segment involved. 3) Pattern of cord involvement on axial images: Look for how much is involved (both halves or not),
which part is involved and evaluate the form of involvement. 4) Cord Swelling (edema) 5) MRI signal characteristics: T1 *Most...
Determining the location of spinal cord lesions helps in differentiatingintra and extramedullary lesions. Adequate knowledge of the imaging characteristicsof intramedullary lesions along with the clinical findings helps in narrowing the differentialdiagnosis.
MD Professor of Diagnostic Radiology University of Toledo Medical Center 3065 Arlington Ave,
OH 43614 Email: firstname.lastname@example.org
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