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Erschienen in:

08.05.2020 | Colorectal Cancer

Oncological Impact of Lateral Lymph Node Dissection After Preoperative Chemoradiotherapy in Patients with Rectal Cancer

verfasst von: Min Jung Kim, M.D., George J. Chang, M.D., M.S., Han-Ki Lim, M.D., Mi Kyung Song, Ph.D., Sung Chan Park, M.D., Dae Kyung Sohn, M.D., Ph.D., Hee Jin Chang, M.D., Ph.D., Dae Yong Kim, M.D., Ph.D., Ji Won Park, M.D., Seung-Yong Jeong, M.D., Ph.D., Jae Hwan Oh, M.D., Ph.D.

Erschienen in: Annals of Surgical Oncology | Ausgabe 9/2020

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Abstract

Purpose

To evaluate the efficacy of selective lateral lymph node dissection (LLND) and the effect of preoperative chemoradiotherapy (PCRT) in patients with LLN ≥ 5 mm.

Methods

Patients who underwent PCRT for rectal cancer were classified: (A) total mesorectal excision (TME)-only with LLN < 5 mm (2001–2009, n = 474), (B) TME-only with LLN < 5 mm (2011–2016, n = 273), (C) TME-only with LLN ≥ 5 mm (2001–2009, n = 102), and (D) TME-LLND with LLN ≥ 5 mm (2011–2016, n = 69). Subgroup analysis was performed in patients with LLN ≥ 5 mm based on the reduction in LLN size to < 5 mm or not on restaging MRI after PCRT.

Results

Oncological outcomes did not differ between groups A and B. Group D had lower 3-year local recurrence (LR) (20.13% vs 5.39%, P = 0.0013) and higher relapse-free survival (RFS) (65.83% vs 77.11%, P = 0.0436) than group C, while the 3-year overall survival (OS) was not significantly different between the two groups (87.64% vs 93.53%, P = 0.0670). In patients with reduction of LLN size from ≥ 5 mm to < 5 mm, LLND significantly reduced LR than did TME alone, but there were no significant differences in survival outcomes. In patients without reduction of LLN size to < 5 mm, LLND reduced LR and improved RFS compared with TME alone.

Conclusions

Selective LLND reduced LR and improved RFS in patients with LLN ≥ 5 mm. Selective LLND reduced LR in patients with reduction of LLN size from ≥ 5 mm to < 5 mm after PCRT, and improved both LR and RFS in patients without reduction of LLN size to < 5 mm.
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Metadaten
Titel
Oncological Impact of Lateral Lymph Node Dissection After Preoperative Chemoradiotherapy in Patients with Rectal Cancer
verfasst von
Min Jung Kim, M.D.
George J. Chang, M.D., M.S.
Han-Ki Lim, M.D.
Mi Kyung Song, Ph.D.
Sung Chan Park, M.D.
Dae Kyung Sohn, M.D., Ph.D.
Hee Jin Chang, M.D., Ph.D.
Dae Yong Kim, M.D., Ph.D.
Ji Won Park, M.D.
Seung-Yong Jeong, M.D., Ph.D.
Jae Hwan Oh, M.D., Ph.D.
Publikationsdatum
08.05.2020
Verlag
Springer International Publishing
Erschienen in
Annals of Surgical Oncology / Ausgabe 9/2020
Print ISSN: 1068-9265
Elektronische ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-020-08481-y

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