Evidence map›Paper›PMID 42701915›Full record

ArticleWorld journal of urology2026

Segmental versus non-segmental inferior vena cava resection during robot-assisted radical nephrectomy and thrombectomy: an overlap-weighted analysis.

Yunhe Guan, Ye Yan, Ruiyang Xie, Liyuan Ge, Xiaojun Tian, Guoliang Wang, Lulin Ma, Hongxian Zhang, Shudong Zhang

Abstract readComparative Study
PubMed Publisher
In one paragraph

Article in World journal of urology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
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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

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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

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

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5 · Who and what money

Authors and funding

9 authors.

Yunhe Guan *Department of Urology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.
Ye Yan *Department of Urology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China. yanye@bjmu.edu.cn.
Ruiyang Xie *Department of Urology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.
Liyuan GeDepartment of Urology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.
Xiaojun TianDepartment of Urology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.
Guoliang WangDepartment of Urology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.
Lulin MaDepartment of Urology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.
Hongxian ZhangDepartment of Urology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.
Shudong ZhangDepartment of Urology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China. zhangshudong@bjmu.edu.cn.

Funding

National Natural Science Foundation of China 82473287
6 · The paper itself

Abstract

purposeIVC segmental resection (SR) during robot-assisted radical nephrectomy and IVC thrombectomy (RARN-IVCT) is selected for wall invasion, occlusion, and collateral outflow, making direct comparison with non-segmental resection (NSR) biased. We compared the perioperative and renal safety of SR versus NSR in the overlap population.

methodsRetrospective single-center cohort at Peking University Third Hospital (2014-2025): 120 patients with RCC and Mayo level II-IV IVC thrombus undergoing RARN-IVCT, including 45 SR and 75 NSR. Overlap weighting balanced baseline variables. Primary outcomes were AKI, ΔSCr, and ΔeGFR; secondary outcomes were complications and hospital stay, with OS assessed exploratorily.

resultsAfter weighting, no statistically significant differences were observed in AKI, ΔSCr, ΔeGFR, complications, hospital stay, or OS. SR had lower RBC transfusion volume (mean difference - 249.63 mL, 95% CI - 443.20 to - 56.05; P = 0.011). SR met non-inferiority/equivalence for hospital stay and pneumonia; renal non-inferiority was not established. Limitations include retrospective design, limited effective sample size, and unmeasured anatomic/hemodynamic confounding.

conclusionIn overlap patients, no statistically significant differences in renal or safety/recovery outcomes were observed, but neither renal non-inferiority nor equivalence was established. Planning should consider thrombus-wall interaction, caval patency, collateral outflow, and renal reserve.

Indexed as

Carcinoma, Renal CellKidney NeoplasmsNephrectomyRobotic Surgical ProceduresThrombectomyVena Cava, InferiorVenous ThrombosisAgedFemaleHumansMaleMiddle AgedRetrospective StudiesInferior vena cava tumor thrombusOverlap weightingRenal cell carcinomaRobot-assisted nephrectomySegmental resection

Identifiers

PMID42701915

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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.