PMC9374009_01
Preoperative: T2-weighted axial (A) and sagittal (B) MR images without contrast.
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F1
A lumbar spine MR scan showed that the L5-S1 intervertebral disc was slightly herniated to the rear left (Figure 1).
Intraoperative: Axial (A) and sagittal (B) CT images of collagenase treatment.
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F2
The patients received 600 u collagenase via a needle (Figure 2).
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.
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F3
T1WI, hyperintense signal on T2WI (Figure 3 A-C), and a "ring" enhancement visible after administration of gadolinium (Figure 3 D-F). Two days later, the patient underwent surgical treatment (percutaneous endoscopic lumbar discectomy with an operative route of the posterolateral).
Pathology findings: The nudule was nucleus pulposus tissues, with some fibrous tissues and leukomonocytes.
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F4
Pathology showed that the nodule was nucleus pulposus tissue, with some fibrous tissues and leukomonocytes (Figure 4).