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  Indian J Med Microbiol
 

Figure 1: Schematic diagram of the relative anatomy for the entry portal to a posterior approach vertebrectomy. The vertebral body replacement expandable cage must be small enough to travel between upper endplate and adjacent spinal nerve root (DNE) (A) and able to expand sufficiently to restore anterior column height (vertebral body and 2D) (B). The posterior approach expansion ratio is the ratio between the vertebral body and 2D and the entry portal

Figure 1: Schematic diagram of the relative anatomy for the entry portal to a posterior approach vertebrectomy. The vertebral body replacement expandable cage must be small enough to travel between upper endplate and adjacent spinal nerve root (DNE) (A) and able to expand sufficiently to restore anterior column height (vertebral body and 2D) (B). The posterior approach expansion ratio is the ratio between the vertebral body and 2D and the entry portal