before major hepatectomy, in case of insufisant future liver remanent volume or function, portal embolization is a routinely used method to enable growth of the future liver remnant. Recently liver venous deprivation has been described in some pioneer centre. The results are processing with greater and faster hypertrophy allowing probably less drop out from the embolization to surgery compared to portal embolization.

In major hepatectomy, and specially in right or extended right hepatectomy the segment IV plays an important role in the proportion of future liver remnant.

Despite the growing interest in the scientific community for liver venous deprivation many aspects concerning the liver hypertrophy remains unexplored. In particular the the degree of hypertrophy of segment IV after liver venous deprivation compared to portal embolization.

Inclusion criteria:

- patient with liver tumor selected for right hepatectomy with insufficient future liver remnant who have undergoes portal embolization or liver venous deprivation

Exclusion criteria:

- left / extended left hepatectomy

Patient with liver tumors selected for surgery with insufficient futur liver remnant

NC