Fig 2. Case 2. Lumbar spine plain films and MR imaging were taken 8 months after vertebroplasty.

A, AP view conventional radiograph of lumbar spine.

B, Lateral view conventional radiograph of lumbar spine.

C, Sagittal MR imaging.

D and E, Axial MR imaging.

There is hyperattenuated bone cement in L2 vertebral body and in the spinal canal (arrows) on the anteroposterior and lateral conventional radiographs (A and B). On the proton-weighted image (C) and T2-weighted image (D and E), bone cement is low in signal intensity. Bone cement is found inside the dural sac in C and D (arrow). Needle tract can be identified as a low-signal-intensity channel (arrows) in the vertebral body extending posteriorly to the epidural space (E). The technical flaw in this case was puncturing the epidural space with the needle allowing cement to extend posteriorly to the epidural space along the needle tract.