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 |