Abstract
Purpose
Positive pathologic lymph nodes in colorectal cancer represent an important prognostic indicator. Whether lymph node distribution or the number of metastatic nodes is more strongly associated with survival prediction remains controversial.
Methods
Among 3449 colorectal cancer surgeries performed at Nagasaki University Hospital and five affiliated institutions from April 2016 to March 2022, we investigated 604 patients who underwent laparoscopic radical resection and were diagnosed with pathological stage III cancer. Patients were divided into two groups according to whether they had central vessel metastasis (LND3 group, n=42) or not (LND1/2 group, n=562). After adjusting for background factors using propensity score matching, the LND3 group included 42 patients and the LND1/2 group included 40 patients. Patient background characteristics and prognosis were compared between these two groups.
Results
Before matching, frequencies of right-side colon cancer (64.3% vs 38.1%, p=0.001), multivisceral resection (11.9% vs 4.4%, p=0.039), clinical N2 status (40.5% vs 22.6%, p=0.032), and pathological N2 (73.8% vs 22.6%, p<0.001) were all greater, and the number of lymph nodes retrieved was higher (24 vs 19, p=0.042) in the LND3 group. After matching, no differences in any clinical factors were evident between groups. Five-year RFS (44.8% vs 77.1%, p=0.004) and OS (43.1% vs 83.2%, p<0.001) were worse in the LND3 group. Adjuvant chemotherapy improved RFS (adjuvant chemotherapy (+) vs adjuvant chemotherapy (−): 62.1% vs 27.7%, p=0.047) in the LND3 group.
Conclusion
LND3-positive patients show poorer prognosis than LND1/2 patients and should be treated with an appropriate perioperative treatment strategy.
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Data availability
The datasets generated and/or analyzed during the current study are available from the corresponding author on reasonable request.
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KN and TT mainly designed the study and analyzed the data. TN, RO, KO, YT, MI, MH, HT, SO, and KI performed surgery and provided patient care. TN supervised this study.
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This research study was conducted retrospectively using data obtained for clinical purposes, and was reviewed and approved by the Clinical Research Review Board of Nagasaki University Hospital (approval no. 16062715-5).
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Informed consent was obtained as part of routine care from all individual participants included in the study.
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Noda, K., Tominaga, T., Nonaka, T. et al. Prognostic value of lymph node distribution after laparoscopic colectomy with Japanese D3 dissection. Langenbecks Arch Surg 409, 28 (2024). https://doi.org/10.1007/s00423-023-03222-7
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DOI: https://doi.org/10.1007/s00423-023-03222-7