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The LRV compression by adjacent anatomical structures, including but not limited to RRA and multiple compression-related parameters, were investigated through multiplanar analysis of the CT data.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>The overall LRV entrapment rates by adjacent structures were 41.93% (12\/31) and 24.00% (6\/25), the rates of RRA-sourced LRV compression 22.58% (7\/31) and 20.00% (5\/25), and the rates of compression by superior mesenteric artery (SMA) 16.13% (5\/31) and 4.00% (1\/25) in the Renal and Non-renal groups, respectively, with no significance. The venous segments distal to the RRA-compressed site had a significantly larger transectional lumen area than those of the non-compressed veins in both groups (3.09\u2009\u00b1\u20091.29 vs. 1.82\u2009\u00b1\u20090.23, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001 and 4.30\u2009\u00b1\u20092.65 vs. 2.12\u2009\u00b1\u20090.55, <jats:italic>p<\/jats:italic>\u2009=\u20090.006; maximum-to-minimum area ratios in Renal and Non-renal groups, respectively). Nearly 80% of RRAs were found arising anteriorly rightwards instead of passing straight to the right.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>RRA-sourced LRV compression was not rare, and its incidence was higher than that of the compression by SMA in both patient cohorts. RRA could be a more common compression source than SMA concerning LRV entrapment. Further investigations involving different populations, including healthy individuals, are needed.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00345-024-05053-7","type":"journal-article","created":{"date-parts":[[2024,5,29]],"date-time":"2024-05-29T20:15:41Z","timestamp":1717013741000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["A new notable compression source of left renal vein entrapment: right renal artery"],"prefix":"10.1007","volume":"42","author":[{"given":"Zhanfeng","family":"Sun","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haitao","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huijie","family":"Jiang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yongbin","family":"Shen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ziming","family":"Shi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qingxiao","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Han","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weiliang","family":"Jiang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0960-2764","authenticated-orcid":false,"given":"Xuanyi","family":"Du","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,5,29]]},"reference":[{"key":"5053_CR1","doi-asserted-by":"publisher","first-page":"552","DOI":"10.4065\/mcp.2009.0586","volume":"85","author":"AK Kurklinsky","year":"2010","unstructured":"Kurklinsky AK, Rooke TW (2010) Nutcracker phenomenon and nutcracker syndrome. 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