MRI observation of migration paths of disk fragment in the anterior epidural space
- VernacularTitle:腰椎间盘碎片在前硬膜囊外间隙中游走路径的MRI观察
- Author:
Yuxiang ZHANG
- Publication Type:Journal Article
- Keywords:
Intervertebral disk displacement;
Joint loose bodies;
Epidural space;
Magnetic resonance imaging
- From:
Chinese Journal of Radiology
2001;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the migration paths of disk fragment in the anterior epidural space (AES). Methods Eighteen operation-proved cases with herniated nucleus pulposus of lumbar disk were collected and the MR findings were retrospectively reviewed. Results The disk fragments moved in a superior (12 cases,67%) or inferior (6 cases,33%) direction from the donor disk. 10 cases occurred in right septum and 8 cases in left septum. The displaced disk components were most frequently dislodged into the right or left AES, and rarely straddled the midline. On sagittal T 2WI, fragments exhibited low or intermediate signal intensity and compressed the dura mater of spinal cord. On T 1WI, fragments exhibited intermediate signal intensity and compressed the PLL and the spinal cord. On axial T 2WI, fragments exhibited compression of the PLL, the midline septum, and the dura mater of spinal cord. On fat-suppression scan, fragments exhibited increased signal intensity. Conclusion The migrating path of a disk fragment is determined by the anatomy of the AES. Fat-suppression scan has a clinical diagnostic significance.
