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  1. A rod with a uniform diameter (3.4 or 4.0 mm) combined with a site to site connector between the cervical and thoracic spine. The rod connectors will have different diameters.

The rod connectors at this level are usually bulky and may cause problems with the wound closure.

Transverse connectors can be used in case of severe torsional instability, but they also may cause problems with wound closure at this level.