Renal lesions as the initial presentation of IgG4-related disease (IgG4-RD) and isolated IgG4-related kidney disease (IgG4-RKD) are rare.1,2A 65-year-old male with a history of high-grade urothelial cell carcinoma in remission was found to have multiple renal lesions on surveillance imaging (Figure 1A).

中文翻译：

---

在一名高级别尿路上皮细胞癌患者的监测成像过程中发现肾脏局限性 IgG4 相关疾病，表现为低密度病变。


以肾脏病变为首发表现的 IgG4 相关疾病 (IgG4-RD) 和孤立性 IgG4 相关肾脏疾病 (IgG4-RKD) 很少见。1,2A 65 岁男性，有高级别尿路上皮细胞癌病史监测影像发现缓解期患者有多个肾脏病变（图 1A）。