We discuss the anatomy of the thoracic, lumbar, and sacral levels of the spinal cord. Given the nature of endoscopic surgery, it is recommended that the surgeon have thorough knowledge not only of the bony architecture but also of important visceral and other soft tissue structures. It is essential to understand the normal anatomy to recognize the abnormal and anatomic variations. We present the so-called normal anatomic configurations and illustrate how these structures vary at the different levels of the spinal column.
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