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MRI of lower back showing narrowing of the thecal sac, disc fragmentation and disc herniation. What does it mean?

I just had an MRI a few weeks ago on my lower back and I finally just got my results and I was wondering if you could tell me what it means. It says the Central disc L4-L5 is noted as well, there is a slight narrowing of the thecal sac with AP dimension of 8.6 mm at this level, it was 9.8 on the prior exam. The impression states: from exam dated 9/10/2012, there have been large reabsorption of significant disc fragment at L5-S1, mild central disc herniation remain. There is mild central disc and 45 which is narrowing the AP dimension of thecal sac from prior examination. If you could please tell me what this means that would be great and thank you for your time.
Asked On : Mon, 1 Apr 2013
Answers:  1 Views:  69
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Radiologist 's  Response
May 2014
The spine as you know is a set of small blocks of bones arranged one on top of the other to form a pillar support for the body. Now these blocks of bones and connected to each other by spongy cushions called discs between them. At the posterior part of the pillar and behind the discs we have the spinal cord running down from the neck to the tail region.
In your report, the disc at L4-5 (lower back) is showing some degenerative changes. Further there is a slight increase in the posterior transition of the disc at that level.
At L5-S1 level, the disc might have got fragmented due to degenerative process.
For you it means that if the pain is severe and unbearable, please let your doctor know and they will guide you towards a pain free future.
Hope this helps.
Answered: Sat, 8 Jun 2013
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