Evidence map›Paper›PMID 32710131›Full record

ArticleSurgery today2021

Optimal extent of central lymphadenectomy for right-sided colon cancers: is lymphadenectomy beyond the superior mesenteric vein meaningful?

Kota Sahara, Jun Watanabe, Atsushi Ishibe, Koki Goto, Shogo Takei, Yusuke Suwa, Hirokazu Suwa, Mitsuyoshi Ota, Chikara Kunisaki, Itaru Endo

Abstract read
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In one paragraph

Article in Surgery today, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 2 pooled it
0.9field-weighted citation impact, top 23% 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

11 citing papers in PubMed, 2 syntheses or guidelines pooled it, 16 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
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  4. Observational
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 4 institutions in 1 country.

Kota SaharaDepartment of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan.ORCID http://orcid.org/0000-0002-4715-5937
Jun WatanabeDepartment of Surgery, Gastroenterological Center, University Medical Center, Yokohama, Japan. nabe-jun@comet.ocn.ne.jp.
Atsushi IshibeDepartment of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
Koki GotoDepartment of Surgery, Gastroenterological Center, University Medical Center, Yokohama, Japan.
Shogo TakeiDepartment of Surgery, Gastroenterological Center, University Medical Center, Yokohama, Japan.
Yusuke SuwaDepartment of Surgery, Gastroenterological Center, University Medical Center, Yokohama, Japan.
Hirokazu SuwaDepartment of Surgery, Yokosuka Kyosai Hospital, Yokosuka, Japan.
Mitsuyoshi OtaDepartment of Surgery, Yokohama City Minato Red Cross Hospital, Yokohama, Japan.
Chikara KunisakiDepartment of Surgery, Gastroenterological Center, University Medical Center, Yokohama, Japan.
Itaru EndoDepartment of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
Yokohama City University Medical Center · JPYokohama City University · JPYokohama Municipal Minato Red Cross Hospital · JPYokosuka Kyosai Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe objective of the current study was to assess the therapeutic benefit of lymphadenectomy according to the extent of lymphadenectomy.

methodsPatients undergoing colectomy for right-sided colon cancer were identified. Distribution of lymph node metastases (DLNM) of 1, 2 and 3 were defined as lymph node metastasis (LNM) in the pericolic nodes, the intermediate nodes and the front of the SMV near the origin of the major artery, respectively. The therapeutic index (TI) was calculated based on the frequency of LNM and the 5 year overall survival (OS) rate of patients with LNM.

resultsAmong 344 patients who met the inclusion criteria, roughly half had LNM (n = 150, 43.7%). While 107 (31.1%) and 30 (8.7%) patients had DLNM1 and DLNM2, respectively, only 13 patients (3.8%) were defined as DLNM3. However, there was no significant difference in 5 year OS by DLNM (DLNM1 71.1%, DLNM2 78.7%, DLNM3 50.4%, p = 0.61). Overall, the TI of lymphadenectomy for D3 area was approximately 1/10 of the TI for D1 (1.9 vs.22.1), given the low frequency of LNM (3.8%) and poor 5 year OS of patients with LNM (50.4%). This trend was consistent irrespective of primary tumor locations.

conclusionThe survival benefit from central lymphadenectomy namely D3 was low among patients with right-sided colon cancers.

Indexed as

Margins of ExcisionMesenteric VeinsAgedColectomyColonic NeoplasmsFemaleHumansLymphatic MetastasisLymph Node ExcisionMaleMiddle AgedSurvival RateCentral vascular ligationColon cancerComplete mesocolic excisionSurvivalTherapeutic index

Identifiers

PMID32710131
OpenAlexW3043990945

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

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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.