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Fig. 1 | BMC Musculoskeletal Disorders

Fig. 1

From: A novel vertebral trench technique (VTT) involving transforaminal endoscopic lumbar foraminotomy (TELF) for very highly up-migrated lumbar disc herniation above L5

Fig. 1

(A) Four anatomic zones and levels of disc herniation, as divided by Lee et al.: zone 1, the far-upward zone, within 3 mm of the lower edge of the upper pedicle. (B) in this article, the very highly up-migrated disc herniation represents that the migration of the herniated disc to the cephalad side beyond the level of the lower edge of the cephalad lumbar pedicle

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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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