Evidence map›Paper›PMID 33228677›Full record

SynthesisWorld journal of surgical oncology2020

Lateral lymph node dissection reduces local recurrence of locally advanced lower rectal cancer in the absence of preoperative neoadjuvant chemoradiotherapy: a systematic review and meta-analysis.

Xiang Gao, Cun Wang, Yongyang Yu, Dujanand Singh, Lie Yang, Zongguang Zhou

Open access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in World journal of surgical oncology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 4 pooled it
4.1field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 4 syntheses or guidelines pooled it, 59 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
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  4. Pooled it
  5. Article
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  8. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Xiang GaoInstitute of Digestive Surgery, Sichuan University, Chengdu, Sichuan, China.ORCID http://orcid.org/0000-0001-5507-4232
Cun WangInstitute of Digestive Surgery, Sichuan University, Chengdu, Sichuan, China.
Yongyang YuInstitute of Digestive Surgery, Sichuan University, Chengdu, Sichuan, China.
Dujanand SinghInstitute of Digestive Surgery, Sichuan University, Chengdu, Sichuan, China.
Lie YangInstitute of Digestive Surgery, Sichuan University, Chengdu, Sichuan, China. lie_222@163.com.
Zongguang ZhouInstitute of Digestive Surgery, Sichuan University, Chengdu, Sichuan, China. zhou767@163.com.
Sichuan University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe impact of lateral lymph node dissection (LLND) in locally advanced lower rectal cancer remains controversial. This study is to compare total mesorectal excision (TME) with or without LLND in lower rectal cancer cases of stage II/III.

methodsThe electronic databases were systematically searched that compared TME with or without LLND among patients with lower rectal cancer in clinical stage II/III. Subgroup analysis was performed considering neoadjuvant chemoradiotherapy (nCRT). The hazard ratios (HR), relative risk (RR), and weighted mean difference (WMD) were pooled.

resultsTwelve studies of 4458 patients of this meta-analysis demonstrate, LLND alone significantly reduced the local recurrence rate of patients who did not receive nCRT (RR 0.71, P = 0.004), while the difference was not significant when combined with nCRT (RR 0.70, P = 0.36). The analysis shows TME with LLND was associated with significantly longer operation time (WMD 90.73 min, P < 0.001), more intraoperative blood loss (WMD 303.20 mL, P < 0.001), and postoperative complications (RR = 1.35, P =0.02). Whereas urinary dysfunction (RR 1.44, P = 0.38), sexual dysfunction (RR 1.41, P = 0.17), and postoperative mortality (RR = 1.52, P = 0.70), were similar between these two groups. Statistically, no significant differences were observed in OS (HR 0.93, P = 0.62), DFS (HR 0.99, P = 0.96), total recurrence (RR 0.98, P = 0.83), lateral recurrence (RR 0.49, P = 0.14), or distal recurrence (RR 0.95, P = 0.78) between these two groups regardless of whether nCRT was performed or not.

conclusionsThe study shows LLND alone decreases the local recurrence without using nCRT irrespective of the survival advantage in locally advanced lower rectal cancer. The benefit of controlling local recurrence by LLND alone makes us reconsider the usage of nCRT with LLND.

trial registrationThe protocol for this meta-analysis was registered prospectively with PROSPERO ( CRD42020135575 ) on 16 May 2019.

Indexed as

Neoadjuvant TherapyRectal NeoplasmsChemoradiotherapyDisease-Free SurvivalHumansLymph Node ExcisionNeoplasm Recurrence, LocalNeoplasm StagingPrognosisTreatment OutcomeLateral lymph node dissectionNeoadjuvant chemoradiotherapyRectal cancerTotal mesorectal excision

Identifiers

PMID33228677
PMCPMC7685653
OpenAlexW3098979764

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.