{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T09:48:35Z","timestamp":1782899315635,"version":"3.54.5"},"reference-count":11,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T00:00:00Z","timestamp":1782864000000},"content-version":"vor","delay-in-days":181,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"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":["Case Reports in Radiology"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:p>Retroperitoneal fibrosis (RPF) is a rare fibroinflammatory condition producing inflammatory masses in the retroperitoneum that can obstruct retroperitoneal structures, including vessels and ureters. RPF typically presents in middle\u2010aged men and may be associated with IgG\u20104\u2013related disease (IgG\u20104 RD). This report describes a 34\u2010year\u2010old woman who presented 6 months postpartum with left leg swelling and lower abdominal pain. Contrast\u2010enhanced CT revealed a homogenous retroperitoneal soft\u2010tissue mass encasing the aorta and iliac arteries, with inferior vena cava (IVC) obstruction and collateral venous return through extensive pelvic varices. MRI findings included hypointensity on T2\u2010weighted imaging and restricted diffusion. Management with thrombolytics and steroids resulted in recanalization of the IVC, though persistent hydronephrosis required nephrostomy and further urological intervention. The presentation of RPF in a young woman is unusual, and we theorize that immune system reactivation following the relative immunosuppression during pregnancy may have precipitated the condition. The case illustrates one of several immunologic factors associated with RPF.<\/jats:p>","DOI":"10.1155\/crra\/6285423","type":"journal-article","created":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T09:11:42Z","timestamp":1782897102000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Postpartum Retroperitoneal Fibrosis With IVC Obstruction: A Case Report"],"prefix":"10.1155","volume":"2026","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-7170-5323","authenticated-orcid":false,"given":"Roy Clark","family":"Basiimwa","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Samuel","family":"Bugeza","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rita","family":"Nassanga","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dell P.","family":"Dunn","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,7,1]]},"reference":[{"key":"e_1_2_12_1_2","doi-asserted-by":"publisher","DOI":"10.1259\/bjrcr.20190086"},{"key":"e_1_2_12_2_2","doi-asserted-by":"publisher","DOI":"10.7759\/cureus.4075"},{"key":"e_1_2_12_3_2","doi-asserted-by":"publisher","DOI":"10.1681\/ASN.2015101110"},{"key":"e_1_2_12_4_2","doi-asserted-by":"publisher","DOI":"10.1148\/rg.332125085"},{"key":"e_1_2_12_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.radcr.2019.01.006"},{"key":"e_1_2_12_6_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiol.14131565"},{"key":"e_1_2_12_7_2","doi-asserted-by":"publisher","DOI":"10.5152\/dir.2014.14027"},{"key":"e_1_2_12_8_2","doi-asserted-by":"publisher","DOI":"10.2147\/IJNRD.S239160"},{"key":"e_1_2_12_9_2","doi-asserted-by":"publisher","DOI":"10.2214\/AJR.11.7822"},{"key":"e_1_2_12_10_2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0019658"},{"key":"e_1_2_12_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.tranon.2020.100759"}],"container-title":["Case Reports in Radiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1155\/crra\/6285423","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1155\/crra\/6285423","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1155\/crra\/6285423","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T09:11:43Z","timestamp":1782897103000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1155\/crra\/6285423"}},"subtitle":[],"editor":[{"given":"Shashank","family":"Kaushik","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"editor"}]}],"short-title":[],"issued":{"date-parts":[[2026,1]]},"references-count":11,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2026,1]]}},"alternative-id":["10.1155\/crra\/6285423"],"URL":"https:\/\/doi.org\/10.1155\/crra\/6285423","archive":["Portico"],"relation":{},"ISSN":["2090-6862","2090-6870"],"issn-type":[{"value":"2090-6862","type":"print"},{"value":"2090-6870","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,1]]},"assertion":[{"value":"2025-02-17","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-06-13","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-07-01","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"6285423"}}