PMC3579084_01
Before the operation : disc herniation at L4-5 on the right side (white arrow). A-1. Sagittal magnetic resonance image. B-1. Axial magnetic resonance image. After the operation : good decompression of L4-5. A-2. Sagittal magnetic resonance image. B-2. Axial magnetic resonance image. Rootlet herniation : rootlet herniating into the intervertebral disc space at L4-5 on the right side (black arrow). A-3. Sagittal magnetic resonance image. B-3. Axial magnetic resonance image.
jkns-53-52-g001.jpg
PMC3579084_01_jkns-53-52-g001.jpg
F1
Preoperative magnetic resonance imaging (MRI) showed disc herniation at L4-5 on the right side (Fig. 1). Postoperative MRI showed good decompression (Fig. 1). Repeat MRI showed that a rootlet was entrapped into the L4-5 disc space (Fig. 1).
PMC3579084_02
Before the operation : disc herniation at L2-3, L3-4, and L4-5. A-1. Sagittal magnetic resonance image. B-1. Axial magnetic resonance image showing disc herniation at L2-3 on the left side. Rootlet herniation : rootlet herniating into the intervertebral disc space at L2-3 on the left side (white arrow). A-2. Sagittal magnetic resonance image. B-2. Axial magnetic resonance image of L2-3. Myelogram : magnetic resonance myelogram showing intradiscal leakage of cerebrospinal fluid (white arrow).
jkns-53-52-g002.jpg
PMC3579084_02_jkns-53-52-g002.jpg
F2
Initial MRI showed disc bulging at L2-3 and L3-4 and foraminal stenosis at L4-5 bilaterally (Fig. 2). MRI showed rootlet entrapment in the L2-3 disc space (Fig. 2). Magnetic resonance myelography showed continuity of the CSF within the disc space (Fig. 2).
PMC3579084_03
Initial magnetic resonance image : extraforaminal disc herniation at L4-5 on the left side. A-1. Sagittal magnetic resonance image. B-1. Axial magnetic resonance image of L4-5. Before the operation : paramedian disc herniation and extraforaminal disc herniation at L4-5 on the left side. A-2. Sagittal magnetic resonance image. B-2. Axial magnetic resonance image of L4-5. Rootlet herniation : rootlet herniating into the intervertebral disc space at L4-5 on the left side (white arrow). A-3. Sagittal magnetic resonance image. B-3. Axial magnetic resonance image of L4-5.
jkns-53-52-g003.jpg
PMC3579084_03_jkns-53-52-g003.jpg
F3
Initial MRI showed extraforaminal disc herniation at L4-5 on the left side (Fig. 3). Repeat MRI showed recurrence of extraforaminal and paramedian disc herniation at the L4-5 level on the left side (Fig. 3). Repeat MRI showed rootlet entrapment through a dural defect at the L4-5 level on the left side (Fig. 3).
PMC3579084_04
Before the operation : disc herniation with osteophyte at L1-2 (white arrow). A-1. Sagittal magnetic resonance image. B-1. Axial magnetic resonance image of L1-2. Rootlet herniation : rootlet herniating into the intervertebral disc space at L1-2 (white arrow). After the operation : herniated rootlets were reposited.
jkns-53-52-g004.jpg
PMC3579084_04_jkns-53-52-g004.jpg
F4
Preoperative MRI showed disc herniation at L1-2, ossification of the posterior longitudinal ligament (OPLL), central spinal stenosis at L1-2, and fusion of L2-3-4-5 with pedicle screws (Fig. 4). Repeat MRI showed rootlet entrapment through the ventral dural defect site at L1-2 (Fig. 4).