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Risk factors and prognostic significance of lateral pelvic lymph node metastasis in advanced rectal cancer

  • Yukiharu Hiyoshi
  • Yuji Miyamoto
  • Yuki Kiyozumi
  • Kojiro Eto
  • Yohei Nagai
  • Masaaki Iwatsuki
  • Shiro Iwagami
  • Yoshifumi Baba
  • Naoya Yoshida
  • Hideo BabaEmail author
Original Article
  • 25 Downloads

Abstract

Background

The aim of this study was to elucidate the risk factors for and prognostic value of lateral pelvic lymph node (LPLN) metastasis in advanced rectal cancer patients, including those with stage IV disease.

Methods

The treatment outcomes of 78 patients with advanced rectal cancer, the lower margin of which was located at or below the peritoneal reflection, who underwent curative-intent surgery with bilateral LPLN dissection from 2005 to 2018 were retrospectively analyzed.

Results

In total, 78 rectal cancer patients, including 13 patients with stage IV tumors, 9 patients (11.5%) had LPLN metastasis. A multivariate analysis to identify preoperative clinical factors associated with LPLN metastasis showed that tumor location (below the peritoneal reflection: Rb), LPLN metastasis on preoperative imaging and distant metastasis were independent predictors of LPLN metastasis. In addition, metastasis at the regional lymph nodes in the mesorectum was significantly associated with LPLN metastasis. Both the disease-free survival (DFS) and cancer-specific survival (CSS) of patients with LPLN metastasis were significantly worse in comparison to patients without LPLN metastasis, and the CSS of stage IV patients with LPLN metastasis was significantly worse in comparison to stage IV patients without LPLN metastasis.

Conclusions

Tumor location (Rb), LPLN metastasis on preoperative imaging and distant metastasis were risk factors for LPLN metastasis. The prognosis of rectal cancer patients with LPLN metastasis is poor. There may not be the indication of LPLN dissection in stage IV lower rectal cancer except cases having complaints due to LPLN metastasis.

Keywords

Rectal cancer Lateral pelvic lymph node Metastasis Prognosis 

Notes

Compliance with ethical standards

Conflict of interest

All authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© Japan Society of Clinical Oncology 2019

Authors and Affiliations

  • Yukiharu Hiyoshi
    • 1
  • Yuji Miyamoto
    • 1
  • Yuki Kiyozumi
    • 1
  • Kojiro Eto
    • 1
  • Yohei Nagai
    • 1
  • Masaaki Iwatsuki
    • 1
  • Shiro Iwagami
    • 1
  • Yoshifumi Baba
    • 1
  • Naoya Yoshida
    • 1
  • Hideo Baba
    • 1
    Email author
  1. 1.Department of Gastroenterological Surgery, Graduate School of Medical SciencesKumamoto UniversityKumamotoJapan

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