Renal Lymph Nodes

There is almost always 1 (but sometimes 2, especially on the left side) lymph node(s) (Figure 27: 1′, 2) on the blood vessels leading to the renal hilus, but I have included it in the lumbar aortic lymph nodes and not as a separate renal lymph node, for the reasons given in the section on lumbar aortic lymph nodes.