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Disc Degeneration Contributes To The Denser Bone In The Sub-Endplate But Not In The Vertebral Body In Patients With Lumbar Spinal Stenosis Or Disc Herniation London Spine

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Published article

CONCLUSIONS: Disc degeneration grades correlated with the EBQ but not with the VBQ. In patients with lumbar spinal stenosis or disc herniation, DD contributes to the denser bone in the sub-endplate, but not in the whole vertebral body.
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Abstract

Background context: It is commonly believed that decreased bone quality would lead to endplate degeneration and arthritic changes in the facet joints, and thus accelerated disc degeneration (DD). However, some more detailed studies of vertebral bone structure have found that bone mineral density (BMD) in the vertebral body is increased rather than decreased in moderate or greater disc degeneration. The relationship between BMD and DD still needs further study. MRI-based vertebral bone quality scores have been shown to be effective in reflecting BMD, rendering a new way to evaluate the changes of vertebral body bone with DD using MRI alone.

Purpose: To evaluate MRI-based vertebral bone quality and Pfirrmann grades in patients with lumbar spinal stenosis or disc herniation, and to identify if DD is associated with denser bone around the endplate.

Study design/setting: A single-center, retrospective cohort study.

Patient sample: A total of 130 patients with lumbar disc herniation and lumbar spinal stenosis from January 2019 to November 2020 who had a complete dual-energy x-ray absorptiometry scan and non-contrast lumbosacral spine MRI data.

Outcome measures: The vertebral bone quality score (VBQ) and sub-endplate bone quality score (EBQ) was calculated as a ratio of the signal intensity of the vertebral bodies and sub-endplate regions to the signal intensity of the cerebrospinal fluid at L3 on the mid-sagittal T1-weighted MRI images, respectively. The Pfirrmann grades of the lumbar discs were assessed as well.

Methods: The age, gender, body mass index, and T-score of the lumbar spine of the patients were collected. The degeneration grades of the lumbar discs were evaluated according to the Pfirrmann classification. VBQ and EBQ were measured through T1-weighted lumbar MRI. The VBQ and EBQ scores were compared between cranial and caudal sides. The correlation between MRI-based bone quality and DD was calculated. A linear regression model was used to examine the association between DD and adjacent EBQ and VBQ.

Results: This study included 569 lumbar segments from 130 inpatients. Cranial and caudal EBQ decreased with the increase of the Pfirrmann grade. The discs with Pfirrmann grade 5 had significantly lower caudal EBQ than the discs with Pfirrmann grades 2, 3 and 4. In the osteoporosis patients, the Pfirrmann grades negatively correlated both with the cranial EBQ and caudal EBQ. Pfirrmann grade greater than 4 was an independent contributor to the cranial EBQ, whereas greater than 3 was an independent contributor to the caudal EBQ.

Conclusions: Disc degeneration grades correlated with the EBQ but not with the VBQ. In patients with lumbar spinal stenosis or disc herniation, DD contributes to the denser bone in the sub-endplate, but not in the whole vertebral body.

Keywords: Bone mineral density; Bone quality score; Disc degeneration; MRI; Pfirrmann classification; Sub-endplate bone.

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Disc degeneration contributes to the denser bone in the sub-endplate but not in the vertebral body in patients with lumbar spinal stenosis or disc herniation

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Honeywell Paul
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2022-06-08
Truly excellent results! I was diagnosed with lumbar stenosis after experiencing increasing pain in both legs. An MRI and consultation carried out at short notice confirmed this. Mr Akmal recommended that a spacer should be inserted in my lower back to correct the problem and release the nerves from the narrowing caused by stenosis. The operation was conducted very professionally and without pain. After the first two weeks the pain started to subside as expected. After 4 weeks I was completely back to normal. The result is exceptionally good and I feel renewed, with no pain whatsoever and a regained posture, ready to resume a normal life. I cannot recommend The London Spine Unit highly enough. They are medical magicians!
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2022-04-22
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2022-03-22
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2022-03-17
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Abstract Background context: It is commonly believed that decreased bone quality would lead to endplate degeneration and arthritic changes in the facet joints, and thus accelerated disc degeneration (DD). However, some more detailed studies of vertebral bone structure have found that bone mineral density (BMD) in the vertebral body is increased rather than decreased in…

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