Resorbable Barrier for the Prevention of Abdominal and Peri-hepatic Adhesion Formation

The secondary objectives of the study are: During and after the 1st surgical procedure To evaluate immediate complications (during surgery), early complications (during post-surgery hospitalization) and late complications (between 1st and 2nd surgeries) in relation with operating procedure and use of resorbable membrane. During and after the 2nd surgical procedure * To evaluate abdominal and peri-hepatic adhesion (at the site of the 1st surgery), with qualitative and quantitative description. * To evaluate intestinal adhesion (in the small intestine), with quantitative description. * To evaluate immediate complications (during surgery), early complications (during post-surgery hospitalization) and late complications (in the month following the intervention) in relation with operating procedure. * To evaluate post-operative rehabilitation * To assess tumour evolution in patients over a period of 3 years after the 2nd surgery.