{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T17:30:52Z","timestamp":1786728652932,"version":"build-2736575974"},"reference-count":5,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"2","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2023,4]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>A 67-year-old male was incidentally found to have a large left perinephric mass with a poorly functioning left kidney. A differential diagnosis of renal cell carcinoma, lymphoma, retroperitoneal fibrosis (RPF), and IgG4 renal disease was suggested on imaging studies and biopsy of the mass. A left radical nephrectomy was performed as malignancy could not be ruled out. The final diagnosis was RPF without periaortitis and the patient is doing well at 9 months of follow-up. RPF, although characterized as a manifestation of periaortitis and large vessel vasculitis, might also present as an isolated perinephric mass without aortic involvement. Surgical management is an alternative, especially when malignancy is suspected.<\/jats:p>","DOI":"10.4103\/iju.iju_391_22","type":"journal-article","created":{"date-parts":[[2023,8,24]],"date-time":"2023-08-24T08:49:55Z","timestamp":1692866995000},"page":"157-159","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":1,"title":["Primary retroperitoneal fibrosis presenting as a renal mass"],"prefix":"10.4103","volume":"39","author":[{"given":"Nikita","family":"Shrivastava","sequence":"first","affiliation":[{"name":"Department of Urology, AIIMS, Jodhpur, Rajasthan, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Divya","family":"Aggarwal","sequence":"additional","affiliation":[{"name":"Department of Pathology, AIIMS, Jodhpur, Rajasthan, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rahul","family":"Jena","sequence":"additional","affiliation":[{"name":"Department of Urology, AIIMS, Jodhpur, Rajasthan, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2023,3,31]]},"reference":[{"key":"R1-20240903","doi-asserted-by":"crossref","first-page":"1005","DOI":"10.1148\/rg.284075157","article-title":"Neoplastic and non-neoplastic proliferative disorders of the perirenal space:Cross-sectional imaging findings","volume":"28","author":"Surabhi","year":"2008","journal-title":"Radiographics"},{"key":"R2-20240903","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1186\/s13075-021-02627-3","article-title":"Association of retroperitoneal fibrosis with malignancy and its outcomes","volume":"23","author":"Lee","year":"2021","journal-title":"Arthritis Res Ther"},{"key":"R3-20240903","doi-asserted-by":"crossref","first-page":"279","DOI":"10.2147\/IJNRD.S239160","article-title":"Renal involvement in retroperitoneal fibrosis:Prevalence, impact and management challenges","volume":"14","author":"Mizushima","year":"2021","journal-title":"Int J Nephrol Renovasc Dis"},{"key":"R4-20240903","doi-asserted-by":"crossref","first-page":"593","DOI":"10.1016\/j.semarthrit.2017.07.011","article-title":"The value of (18) F-FDG PET\/CT in the distinction between retroperitoneal fibrosis and its malignant mimics","volume":"47","author":"Wang","year":"2018","journal-title":"Semin Arthritis Rheum"},{"key":"R5-20240903","first-page":"732","article-title":"Unilateral perirenal fibrosis without aorta involvement","volume":"19","author":"Lang","year":"2015","journal-title":"Eur Rev Med Pharmacol Sci"}],"container-title":["Indian Journal of Urology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ovid.com\/10.4103\/iju.iju_391_22","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T16:29:56Z","timestamp":1786724996000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ovid.com\/10.4103\/iju.iju_391_22"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,3,31]]},"references-count":5,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2023]]}},"URL":"https:\/\/doi.org\/10.4103\/iju.iju_391_22","relation":{},"ISSN":["0970-1591","1998-3824"],"issn-type":[{"value":"0970-1591","type":"print"},{"value":"1998-3824","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,3,31]]},"assertion":[{"value":"2022-11-06","name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2023-03-03","name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}}]}}