{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,19]],"date-time":"2026-01-19T09:08:02Z","timestamp":1768813682824,"version":"3.49.0"},"reference-count":46,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2017,11,3]],"date-time":"2017-11-03T00:00:00Z","timestamp":1509667200000},"content-version":"vor","delay-in-days":2,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Int J of Rheum Dis"],"published-print":{"date-parts":[[2017,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>Chronic periaortitis (<jats:styled-content style=\"fixed-case\">CP<\/jats:styled-content>) is a disease characterized by a fibro\u2010inflammatory periaortic cuff and adventitia\u2010predominant fibrosis. <jats:styled-content style=\"fixed-case\">CP<\/jats:styled-content> encompasses idiopathic retroperitoneal fibrosis and inflammatory abdominal aortic aneurysm (<jats:styled-content style=\"fixed-case\">AAA<\/jats:styled-content>), and recent studies have documented overlap between <jats:styled-content style=\"fixed-case\">CP<\/jats:styled-content> and immunoglobulin G4\u2010related disease (IgG4\u2010<jats:styled-content style=\"fixed-case\">RD<\/jats:styled-content>). This study aimed to investigate clinical characteristics and treatment outcomes of patients with <jats:styled-content style=\"fixed-case\">CP<\/jats:styled-content>.<\/jats:p><\/jats:sec><jats:sec><jats:title>Method<\/jats:title><jats:p><jats:styled-content style=\"fixed-case\">CP<\/jats:styled-content> patients were identified by retrospective review of 1245 patients with International Classification of Diseases 10th edition code of aortitis or aortic disease. Patients were further classified into IgG4\u2010related and non\u2010IgG4\u2010related <jats:styled-content style=\"fixed-case\">CP<\/jats:styled-content> according to the criteria proposed by a Japanese study.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A total of 61 <jats:styled-content style=\"fixed-case\">CP<\/jats:styled-content> patients were identified. Patients showed a male predominance (70%) with median age of 61 at diagnosis. The abdominal aorta was most commonly involved (84%), while the thoracic aorta was affected in 46% of patients. Twenty\u2010three (38%) patients had accompanying aortic aneurysm. Approximately 60% of patients achieved remission without further relapse during the course. Ten patients were classified as IgG4\u2010related and 25 as non\u2010IgG4\u2010related. There was no significant difference in clinical features and outcomes between groups, with the exception of older age and greater pancreas involvement in IgG4\u2010related patients.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>We documented 61 <jats:styled-content style=\"fixed-case\">CP<\/jats:styled-content> patients including 10 IgG4\u2010related cases. <jats:styled-content style=\"fixed-case\">CP<\/jats:styled-content> involved the abdominal aorta in most patients and the thoracic aorta in approximately 50% of patients. IgG4\u2010related <jats:styled-content style=\"fixed-case\">CP<\/jats:styled-content> patients were older and had greater pancreas involvement, but disease outcomes appeared to be similar between IgG4\u2010related and non\u2010IgG4\u2010related <jats:styled-content style=\"fixed-case\">CP<\/jats:styled-content>.<\/jats:p><\/jats:sec>","DOI":"10.1111\/1756-185x.13194","type":"journal-article","created":{"date-parts":[[2017,11,3]],"date-time":"2017-11-03T15:25:16Z","timestamp":1509722716000},"page":"1751-1762","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":29,"title":["Clinical characteristics and outcomes of 61 patients with chronic periaortitis including IgG4\u2010related and non\u2010IgG4\u2010related cases"],"prefix":"10.1111","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1565-9038","authenticated-orcid":false,"given":"In Young","family":"Kim","sequence":"first","affiliation":[{"name":"Division of 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