Article Figures & Data
Figures
- Fig 1.
Case 2. Sagittal T2-weighted image shows a thin connection (arrow) between the level of abnormal disk and the disk fragment. With imaging, this is classified as extrusion. However, it was classified intraoperatively as extrusion and sequestration.
- Fig 2.
Case 4. Sagittal T2-weighted image shows the height of the abnormal disk herniation (bold arrows) compared with the disk height (thin arrows). By imaging, this is classified as extrusion. However, it was classified intraoperatively as protrusion.
- Fig 3.
Case 9. Sagittal T2-weighted image shows decreased signal of the disk material, which makes differentiation of the disk from the annular margin difficult.
- Fig 4.
Case 15. Sagittal T2-weighted image shows disruption of outer annulus (arrow) even on retrospective interpretation; thus, the imaging classification in this case is extrusion. However, it was classified intraoperatively as a protrusion.
Tables
- Table 1:
Discrepancy cases between imaging and surgery, with a description of the imaging findings
No. Disk Level Imaging Surgical Description 1 4/5 Extrusion Protrusion On sagittal images, the height of the abnormal disk is slightly greater than the disk height 2 2/3 Extrusion Extrusion and sequestration Although imaging suggests a sequestered fragment, there is a thin continuity between the disk fragments visible on MR imaging (Fig 1) 3 4/5 Extrusion Protrusion On sagittal images, the height of the abnormal disk is slightly greater and very close in distance to the maximum disk height 4 4/5 Extrusion Protrusion On sagittal images, the height of the abnormal disk is very close in distance to the maximum disk height (Fig 2) 5 4/5 Extrusion Extrusion and sequestration Sagittal images show a connection between disk fragments 6 4/5 Extrusion Protrusion On sagittal images, the abnormal disk appears contained by the outer annulus, but the height of the annulus is slightly greater than the disk height 7 4/5 Extrusion Protrusion On sagittal images, the height of the abnormal disk is slightly greater than the disk height 8 5/1 Extrusion Protrusion On sagittal images, the height of the abnormal disk is slightly greater than the disk height 9 5/1 Protrusion Extrusion On the sagittal view, the low signal of the disk and annulus is very difficult to differentiate (Fig 3) 10 4/5 Extrusion Protrusion On sagittal images, the height of the abnormal disk is very similar to the disk height 11 4/5 Protrusion Extrusion On the sagittal view, the low signal of the disk and annulus is very difficult to differentiate 12 4/5 Protrusion Extrusion On sagittal images, the entire annulus is not clearly defined 13 5/1 Protrusion Extrusion On sagittal images, the abnormal disk height is similar to the maximum disk height 14 4/5 Extrusion Protrusion On sagittal images, the abnormal disk height is slightly greater than the maximum disk height 15 5/1 Extrusion Protrusion On the sagittal view, abnormal disk height is much greater than the normal disk height and the outer annulus appears disrupted; in retrospect, the diagnosis is still extrusion by imaging criteria (Fig 4) 16 4/5 Extrusion Sequestration Imaging shows a thin connection between the parent disk and disk the fragment
Jump to section
Related Articles
Cited By...
- No citing articles found.