{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T07:53:41Z","timestamp":1791359621725,"version":"4.3.1"},"reference-count":19,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T00:00:00Z","timestamp":1791331200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T00:00:00Z","timestamp":1791331200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["IJU Case Reports"],"published-print":{"date-parts":[[2026,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Primary renal vein leiomyosarcoma is an extremely rare disease and the tumor often infiltrates the vessel wall. We report a case of primary renal vein leiomyosarcoma that enlarged while preserving the structure of the renal vein lumen.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Case Presentation<\/jats:title>\n                    <jats:p>A 64\u2010year\u2010old woman underwent a computed tomography scan, which revealed a left renal hilar mass. Extra\u2010gastrointestinal stromal tumor, leiomyosarcoma, and inflammatory myofibroblastic tumor remained in the differential diagnoses based on blood, urine, and imaging test findings. The tumor, left renal vein, kidney, and adrenal gland were resected. Hematoxylin\u2013eosin staining revealed a tumor arising from the renal vein wall and proliferating outward beyond the vessel. The diagnosis was primary renal vein leiomyosarcoma.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>When a well\u2010defined solid tumor adjacent to the renal vein is identified, leiomyosarcoma should be considered in the differential diagnosis, and complete resection of the tumor should be pursued.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/iju5.70273","type":"journal-article","created":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T07:39:01Z","timestamp":1791358741000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Leiomyosarcoma of the Renal Vein That Enlarged Laterally While Preserving the Structure of the Renal Vein Lumen"],"prefix":"10.1002","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-3599-2259","authenticated-orcid":false,"given":"Naoki","family":"Tashiro","sequence":"first","affiliation":[{"name":"Department of Urology, Faculty of Medicine University of Miyazaki  Miyazaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yume","family":"Sakaki","sequence":"additional","affiliation":[{"name":"Department of Urology, Faculty of Medicine University of Miyazaki  Miyazaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akito","family":"Fujinaga","sequence":"additional","affiliation":[{"name":"Department of Urology, Faculty of Medicine University of Miyazaki  Miyazaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8427-644X","authenticated-orcid":false,"given":"Takahiro","family":"Nagai","sequence":"additional","affiliation":[{"name":"Department of Urology, Faculty of Medicine University of Miyazaki  Miyazaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-2847-9697","authenticated-orcid":false,"given":"Chie","family":"Onizuka","sequence":"additional","affiliation":[{"name":"Department of Urology, Faculty of Medicine University of Miyazaki  Miyazaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shoichiro","family":"Mukai","sequence":"additional","affiliation":[{"name":"Department of Urology, Faculty of Medicine University of Miyazaki  Miyazaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshiko","family":"Umekita","sequence":"additional","affiliation":[{"name":"Section of Oncopathology and Morphological Pathology, Department of Pathology, Faculty of Medicine University of Miyazaki  Miyazaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1171-2620","authenticated-orcid":false,"given":"Yuichiro","family":"Sato","sequence":"additional","affiliation":[{"name":"Section of Oncopathology and Morphological Pathology, Department of Pathology, Faculty of Medicine University of Miyazaki  Miyazaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Toshiyuki","family":"Kamoto","sequence":"additional","affiliation":[{"name":"Department of Urology, Faculty of Medicine University of Miyazaki  Miyazaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4833-1709","authenticated-orcid":false,"given":"Atsuro","family":"Sawada","sequence":"additional","affiliation":[{"name":"Department of Urology, Faculty of Medicine University of Miyazaki  Miyazaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,7]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1515\/raon-2016-0051","article-title":"Leiomyosarcoma of the Renal Vein: Analysis of Outcome and Prognostic Factors in the World Case Series of 67 Patients","volume":"51","author":"Novak M.","year":"2017","journal-title":"Radiology and Oncology"},{"key":"e_1_2_11_3_1","first-page":"244","article-title":"Leiomyosarcoma Arising From the Renal Vein","volume":"110","author":"Sho S.","year":"2019","journal-title":"Nihon Hinyokika Gakkai Zasshi"},{"key":"e_1_2_11_4_1","doi-asserted-by":"crossref","first-page":"276","DOI":"10.2214\/ajr.179.1.1790276","article-title":"Leiomyosarcoma of the Renal Vein: Imaging and Surgical Reconstruction","volume":"179","author":"Kaushik S.","year":"2002","journal-title":"AJR. 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