**5. Conclusions**

Due to the increase of aged patients with atherosclerosis, more attention should be paid to the endothelial damage of great vessels and an infected aneurysm should be properly diag‐ nosed and carefully managed.

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**Figure 3.** A case of chronic periaortitis with retroperitoneal fibrosis. A 75-year-old man presented with vague discomfort of lower abdomen. Panel A was at presentation. Two months later the symptoms remained un‐ changed with 8.5mg/dL of C-reactive protein but without fever. Repeated CT was performed (Panel B). Biopsy of the tissue revealed the infiltration of inflammatory cells and no bacteria (Panel C). Panel D was three weeks after the glucocorticoid therapy.
