这个词是什么意思？
A slowly progressive condition of unknown etiology, characterized by deposition of fibrous tissue in the retroperitoneal space compressing the ureters, great vessels, bile duct, and other structures. When associated with abdominal aortic aneurysm, it may be called chronic periaortitis or inflammatory perianeurysmal fibrosis.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D012185 · MeSH 2026。
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