Resection of extrahepatic bile ducts is radical for Bismuth-Corlette types I-II. Extensive liver resections are indicated for types III-IV. To assess resection quality, it is important to consider "clearness" of true resection margin, taking into account all loci of invasion. According to this approach, 5-year survival rate after R0 or R+1-2 resection is 100%.
Kovalenko et al. (Thu,) studied this question.