"The experience of each one of us is the treasure of all. " Gerard de Nerval In 1952, J. L. Lortat-Jacob 2] reported the first programmed right hepatectomy, which had been carried out for a hepatic metastasis of colorectal origin. Today, excisional surgery of the liver has become a routine procedure, with a low mortality and morbi dity. The varieties of excision have increased and been modified in accordance with the site and number of lesions to be treated. These advances notably stem from both the work on the segmental anatomy of the liver by Couinaud 1] and that of Ton That Tung 3],...