 The retroperitoneal space was then opened and the lymph nodes were dissected, with boundaries of dissection being the bifurcation of the common iliac artery superiorly, psoas muscle laterally, inguinal ligament inferiorly, and the anterior division of the hypogastric artery medially. 
The retroperitoneal space was then opened and the lymph nodes were dissected , with boundaries of dissection being the bifurcation of the common iliac artery superiorly , psoas muscle laterally , inguinal ligament inferiorly , and the anterior division of the hypogastric artery medially .