case_images: PMC6410447_01
case_images: Lumbar MRI of case 1, 4 weeks after surgery.
case_images: CRIM2019-5724342.011.jpg
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case_images: fig11
case_images: Postoperative MRI showed a good decompression with a very small rest disc piece inside the canal sacral (Figure 11).
case_images: Lumbar MRI of case 1 showing highly migrated disc L5-S1 herniation inside the sacral canal.
case_images: CRIM2019-5724342.013.jpg
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case_images: fig13
case_images: The MRI of the lumbar spine (Figure 13) showed a large highly caudally migrated disc herniation in the left side.
case_images: PMC6410447_02
case_images: Bone drill through the S1 pedicle.
case_images: CRIM2019-5724342.004.jpg
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case_images: fig4
case_images: We performed the surgery through the pedicle S1 left-side (Figure 4).
case_images: Endoscopic view of the sequester inside the sacral canal and after removing and decompressing the S1 root.
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case_images: fig8
case_images: Through the bone hole of the S1 pedicle, we found a large sequester (Figure 8(a)); and after removing the sequester by flexible forceps, the S1 root was found floating freely inside the canal (Figure 8(b)).
case_images: Postoperative lumbar MRI with completely removed sequester and bone hole through the pedicle.
case_images: CRIM2019-5724342.012.jpg
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case_images: fig12
case_images: Control MRI (Figure 12) showed a complete removal of the sequester and relieved S1 root after 4 weeks.
case_images: Lumbar MRI of case 2 with large left side caudally dislocated herniation.
case_images: CRIM2019-5724342.014.jpg
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case_images: fig14
case_images: The MRI scan of the lumbar spine (Figure 14) revealed a huge highly caudally migrated herniation with left side compression of S1.
case_images: PMC6410447_03
case_images: Working tube inside the hole of the S1 pedicle with discography over extra puncture.
case_images: CRIM2019-5724342.006.jpg
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case_images: fig6
case_images: The caudally migrated sequester was visible by contrast dyeing (Figure 6, red arrow).
case_images: Endoscopic view to the pedicle hole of S1 with blue-stained sequester and after removing the sequester.
case_images: CRIM2019-5724342.009.jpg
case_images: PMC6410447_03_CRIM2019-5724342.009.jpg
case_images: fig9
case_images: We removed 2 pieces of disc sequester through the bone hole (Figure 9), and the S1 root was visually seen under endoscopic view (Figure 9).
case_images: Lumbar CT 1 day after surgery of case 3 with bone hole of the pedicle.
case_images: CRIM2019-5724342.010.jpg
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case_images: fig10
case_images: The postoperative CT examination showed the access way through the S1 pedicle and the bone hole (Figure 10, red arrow).
case_images: Lumbar MRI of case 3 with left-side S1 compression.
case_images: CRIM2019-5724342.015.jpg
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case_images: fig15
case_images: The MRI showed a free sequester caudally dislocated to the left side of the canal sacral (Figure 15; red arrow).