Lumbar lymphatic trunk Retro-aortic lymph node group 233577 AS retroaortic lymph node Retro-aortic lymph node group FMA:233577 Set of retro-aortic lymph nodes Retro-aortic lymph nodes Post-aortic lymph nodes fma:fma233577 Set of post-aortic lymph nodes Lymph node group of abdomen proper