Colorectal liver metastases in contact with major intrahepatic vessels. Does tumor shrinkage after chemotherapy correspond to a regression of vascular contacts?. (September 2018) - Vigano, L.; Terrone, A.; Costa, G.; Procopio, F.; Cimino, M.; Donadon, M.; Del Fabbro, D.; Palmisano, A.; Torzilli, G.