The right duct is freed up a short distance and a blood vessel loop passed around it for traction (Figure 6). If the tumor has involved the wall of either major duct with probable extension into the liver, the need for added lobectomy must be seriously considered. Occasionally, a third large duct, or even more, may be found on the right side, which must be conserved for implantation. Traction sutures are placed in the major ducts at the point of division for each duct (Figure 7).