Does the extent of lymphadenectomy, number of lymph nodes, positive lymph node ratio and neutrophil–lymphocyte ratio impact surgical outcome of perihilar cholangiocarcinoma?

Extended lymphadenectomy patients (≥20 LNs) had worse OS when compared with those with more limited (<20 LNs) resection. An LNR of at least 0.37 is an independent predictor of DFS.