Figure 1
Preoperative: T2-weighted axial (A) and sagittal (B) MR images without contrast.
Figure 2
Intraoperative: Axial (A) and sagittal (B) CT images of collagenase treatment.
Figure 3
Postoperative: Axial T2-weighted MR image without contrast (A) shows a hyperintense nodule (arrow) in the spinal canal; sagittal image without contrast shows that the nodule (arrow) is hyperintense on T2WI (B) and isointense signal on T1WI (C); fat-suppressed T1-weighted axial (D), sagittal (E) and coronal (F) MR images show the nodule (arrow) displays a “ring” enhancement after gadolinium administration.
Figure 4
Pathology findings: The nudule was nucleus pulposus tissues, with some fibrous tissues and leukomonocytes.