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Article

Clinical significance of enlarged lateral pelvic lymph nodes before and after preoperative chemoradiotherapy for rectal cancer

  • Authors:
    • Yasuhiro Inoue
    • Susumu Saigusa
    • Junichiro Hiro
    • Yuji Toiyama
    • Toshimitsu Araki
    • Koji Tanaka
    • Yaushiko Mohri
    • Masato Kusunoki
  • View Affiliations / Copyright

    Affiliations: Division of Reparative Medicine, Department of Gastrointestinal and Pediatric Surgery, Institute of Life Sciences, Mie University Graduate School of Medicine, Tsu, Mie 514‑8507, Japan
  • Pages: 994-1002
    |
    Published online on: April 8, 2016
       https://doi.org/10.3892/mco.2016.855
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Abstract

Preoperative chemoradiotherapy (CRT) with total mesorectal excision (TME) is the widely accepted treatment for rectal cancer (rc) in Western countries. However, there remains controversy as to whether preoperative CRT is useful in tumors that extend beyond the mesorectum, including metastasis to the lateral pelvic lymph nodes (LPLN). The aim of this study was to assess the prognostic significance of LPLN enlargement in patients with RC who receive preoperative CRT followed by TME without LPLN dissection. We evaluated the prognostic effect of radiographic LPLN enlargement before and after CRT, as well as the patients' clinicopathological and genetic profiles. Of the 104 patients investigated, pretreatment imaging identified 19 (18%) as LPLN‑positive (>7 mm in diameter). Of these 19 patients, 7 (37%) exhibited LPLN downsizing to <7 mm following CRT. The median follow‑up period was 52 months. The 5‑year cancer‑specific survival (CSs) or relapse‑free survival (RFS) did not differ significantly between patients who did and those who did not have positive LPLN on pretreatment imaging. However, LPLN that remained positive after CRT were significantly associated with poorer 5‑year CSS (73 vs. 84%, respectively; P=0.0052) and RFS (32 vs. 78%, respectively; P=0.0264). None of the patients whose LPLN were downsized to <7 mm following CRT developed recurrence; however, those with positive LPLN after CRT had a 55% higher recurrence rate, characterized by delayed local recurrence, a pattern that may be affected by certain chemokines. In conclusion, changes in initially positive LPLN (>7 mm) may predict the prognosis of patients with RC who receive preoperative CRT‑TME. LPLN positivity after CRT was associated with shorter CSs and RFS. Strategies to improve patient survival may include selective LPLN dissection or more aggressive multimodality therapy.
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Copy and paste a formatted citation
Spandidos Publications style
Inoue Y, Saigusa S, Hiro J, Toiyama Y, Araki T, Tanaka K, Mohri Y and Kusunoki M: Clinical significance of enlarged lateral pelvic lymph nodes before and after preoperative chemoradiotherapy for rectal cancer. Mol Clin Oncol 4: 994-1002, 2016.
APA
Inoue, Y., Saigusa, S., Hiro, J., Toiyama, Y., Araki, T., Tanaka, K. ... Kusunoki, M. (2016). Clinical significance of enlarged lateral pelvic lymph nodes before and after preoperative chemoradiotherapy for rectal cancer. Molecular and Clinical Oncology, 4, 994-1002. https://doi.org/10.3892/mco.2016.855
MLA
Inoue, Y., Saigusa, S., Hiro, J., Toiyama, Y., Araki, T., Tanaka, K., Mohri, Y., Kusunoki, M."Clinical significance of enlarged lateral pelvic lymph nodes before and after preoperative chemoradiotherapy for rectal cancer". Molecular and Clinical Oncology 4.6 (2016): 994-1002.
Chicago
Inoue, Y., Saigusa, S., Hiro, J., Toiyama, Y., Araki, T., Tanaka, K., Mohri, Y., Kusunoki, M."Clinical significance of enlarged lateral pelvic lymph nodes before and after preoperative chemoradiotherapy for rectal cancer". Molecular and Clinical Oncology 4, no. 6 (2016): 994-1002. https://doi.org/10.3892/mco.2016.855
Copy and paste a formatted citation
x
Spandidos Publications style
Inoue Y, Saigusa S, Hiro J, Toiyama Y, Araki T, Tanaka K, Mohri Y and Kusunoki M: Clinical significance of enlarged lateral pelvic lymph nodes before and after preoperative chemoradiotherapy for rectal cancer. Mol Clin Oncol 4: 994-1002, 2016.
APA
Inoue, Y., Saigusa, S., Hiro, J., Toiyama, Y., Araki, T., Tanaka, K. ... Kusunoki, M. (2016). Clinical significance of enlarged lateral pelvic lymph nodes before and after preoperative chemoradiotherapy for rectal cancer. Molecular and Clinical Oncology, 4, 994-1002. https://doi.org/10.3892/mco.2016.855
MLA
Inoue, Y., Saigusa, S., Hiro, J., Toiyama, Y., Araki, T., Tanaka, K., Mohri, Y., Kusunoki, M."Clinical significance of enlarged lateral pelvic lymph nodes before and after preoperative chemoradiotherapy for rectal cancer". Molecular and Clinical Oncology 4.6 (2016): 994-1002.
Chicago
Inoue, Y., Saigusa, S., Hiro, J., Toiyama, Y., Araki, T., Tanaka, K., Mohri, Y., Kusunoki, M."Clinical significance of enlarged lateral pelvic lymph nodes before and after preoperative chemoradiotherapy for rectal cancer". Molecular and Clinical Oncology 4, no. 6 (2016): 994-1002. https://doi.org/10.3892/mco.2016.855
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