Anterior cervical decompression
and spine fusion for spondylotic myelopathy
Benefits anterior decompression and spine fusion
surgery
In the past, cervical laminectomy (removing the posterior aspects of the
spinal canal) to decompress (relieve pressure on) the spinal cord had been the
procedure of choice to treat spondylotic myelopathy resulting from cervical arthritis.
(See Cervical laminectomy for
more information.)
However, the majority of the abnormal anatomy producing
spinal cord compression is located anteriorly to (in
front of) the spinal cord itself. This is only indirectly
addressed by a posterior cervical laminectomy. In fact,
chronic spinal instability exacerbating the disease
process may be caused by cervical laminectomy. In addition,
a thick fibrous scar forms at the operative site in
the postoperative period, at times replacing the bony
compression and reproducing the original symptoms after
an extended postoperative period.
For these reasons, many surgeons prefer either anterior
decompression of the spinal cord and nerve roots, or
an adaptation of laminectomy known as laminoplasty,
depending on the patient's anatomy. Anterior cervical
decompressions have two significant benefits:
-
Direct removal of the anterior source of spinal
cord compression.
-
Stabilization of the spine by way of a fusion,
eliminating motion and the development of further
degenerative changes at the operated levels.
Results of the spine surgery
Overall, most surgical series point to a significant
improvement for most patients who undergo an anterior
cervical decompression and fusion (by either multiple
discectomies or corpectomy) before irreversible spinal
cord injury has occurred. At a minimum the operation
can remove the source of spinal cord injury and arrest
the progression of the disease. The prognosis is generally
proportional to the severity of spinal cord compression,
with more advanced cases having a poorer prognosis.
Timely intervention may thus play a role in determining
the patients final outcome. |
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