Abstract
Background: Surgical resection of colorectal liver metastases (CLM) is the only hope for cure, with a 5-year survival rate ranging from 20% to 54%. However, the resectability rate of CLM is reported to be <20%. This limitation is mainly due to insufficient remnant liver and to extrahepatic disease. Among extrahepatic locations, lymph node metastases are often considered indications of a very poor prognosis and a contra-indication to resection.
Methods and Results: Our studies showed that the prevalence of hepatic pedicle lymph node metastases ranges from 10% to 20%. When located near the hilum and along the hepatic pedicle (area 1) they should not be considered an absolute contra-indication to resection of CLM, and an extended lymphadenectomy should be performed. However, when they reach the celiac trunk (area 2), there is no survival benefit after resection of CLM. For other cases of liver malignancies, lymph node dissection seems justified only in cases of fibrolamellar hepatocellular carcinoma and in case of hilar cholangiocarcinoma. However, few data are available, and they are controversial.
Conclusions: There is a need for more evaluation of lymph node involvement, at least in patients with high risk of such an extension, i.e., patients with more than three metastases, located in segment 4 or 5. There is also a need for prospective trials in order to evaluate the survival benefit of liver resection in such circumstances and the impact of extensive lymphadenectomy.
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Jaeck, D. The Significance of Hepatic Pedicle Lymph Nodes Metastases in Surgical Management of Colorectal Liver Metastases and of Other Liver Malignancies. Ann Surg Oncol 10, 1007–1011 (2003). https://doi.org/10.1245/ASO.2003.09.903
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DOI: https://doi.org/10.1245/ASO.2003.09.903