Figure 1. Schematic lateral view of Kambin's triangle and its anatomical relations. There is enormous anatomical variability that makes a greater or lesser foraminoplasty necessary in order to access the canal through it. As can be seen in the image, the limits of the triangle are the emergent nerve root, the descending root along with the margin of the superior joint process, and finally the margin of the inferior endplate to its junction with the lower pedicle.