Evidence map›Paper›PMID 41627416›Full record

SynthesisSurgery today2026

Persistent descending mesocolon and its impact on the short-term outcomes of minimally invasive colorectal surgery: a systematic review and meta-analysis.

Koji Tamura, Takaaki Fujimoto, Kinuko Nagayoshi, Yusuke Mizuuchi, Kenoki Ohuchida, Masafumi Nakamura

Abstract readSystematic ReviewMeta-Analysis
PubMed Publisher
In one paragraph

Synthesis in Surgery today, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
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

1 citing paper in PubMed.

  1. Article
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.

Koji TamuraDepartment of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Fukuoka, 812-8582, Japan. tamura.koji.589@m.kyushu-u.ac.jp.ORCID http://orcid.org/0000-0003-2500-8810
Takaaki FujimotoDepartment of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Fukuoka, 812-8582, Japan.
Kinuko NagayoshiDepartment of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Fukuoka, 812-8582, Japan.
Yusuke MizuuchiDepartment of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Fukuoka, 812-8582, Japan.
Kenoki OhuchidaDepartment of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Fukuoka, 812-8582, Japan.
Masafumi NakamuraDepartment of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Fukuoka, 812-8582, Japan. nakamura.masafumi.861@m.kyushu-u.ac.jp.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposePersistent descending mesocolon (PDM) is a rare congenital anomaly that may complicate minimally invasive surgery (MIS) for colorectal cancer (CRC). This systematic review and meta-analysis evaluated the perioperative impact of PDM on MIS for CRC.

methodsThis study followed the PRISMA guidelines and was registered in PROSPERO (CRD420251055757). A systematic search was performed in PubMed, Cochrane, and Scopus (January, 2000 to April, 2025). Observational studies (OBSs) compared MIS for CRC in patients with and patients without PDM. The primary outcome was operative time and the secondary outcomes included intraoperative blood loss, open conversion rate, complications, and vascular anatomy. Meta-analyses used a random-effects model.

resultsSeven OBSs (4,255 patients) were included in the analysis. PDM patients had significantly longer operative times (Mean difference [MD]:26.4; 95%CI:11.3-41.4) and greater intraoperative blood loss (MD:15.9; 95%CI:3.3-28.4). The rates of conversion to open surgery (Odds rate [OR]:9.6; 95%CI: 3.3-27.8) and anastomotic leakage (OR:2.49; 95%CI:1.2-5.1) were higher in PDM patients. The IMV-colon distance was significantly shorter in PDM patients, potentially increasing the marginal vessel injury risk.

conclusionPDM increases the intraoperative complexity of MIS for CRC. Thus, preoperative recognition of vascular variations is critical and such procedures should be performed at expert centers.

Indexed as

Colorectal NeoplasmsMesocolonMinimally Invasive Surgical ProceduresBlood Loss, SurgicalColorectal Surgical ProceduresConversion to Open SurgeryHumansOperative TimePostoperative ComplicationsTime FactorsTreatment OutcomeColorectal cancerLaparoscopic surgeryMinimally invasive surgeryPersistent descending mesocolon

Identifiers

PMID41627416

What OpenQuestion holds

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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.