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n. surgical cutting into the backbone to obtain access to the vertebral (spinal) canal. The surgeon excises the rear part (the posterior arch) of one or more vertebrae. The operation is performed to remove tumours, to treat injuries to the spine, such as prolapsed intervertebral (slipped) disc (in which the affected disc is removed), or to relieve pressure on the spinal cord or roots.

Subjects: Medicine and Health.

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