In a class III hysterectomy the ureter is dissected from the pubovesicle ligament superiorly, medially, and inferiorly. A small lateral portion of the pubovesicle artery is preserved, thus maintaining some blood supply to the distal ureter. From Piver MS, et al. Obstet Gynecol 1974; 44: 265-72, with permission from Obstetrics & Gynecology.5