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논문 기본 정보

자료유형
학술저널
저자정보
최수진 (울산의대) 오지선 (서울아산병원) 홍석찬 (서울아산병원) 이창근 (울산대학교) 유빈 (울산대학교) 홍범식 (울산대학교) 김용길 (울산대학교)
저널정보
대한류마티스학회 대한류마티스학회지 대한류마티스학회지 제28권 제1호
발행연도
2021.1
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38 - 44 (7page)

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Objective. Hydronephrosis, a common complication of idiopathic retroperitoneal fibrosis (iRPF), may lead to poor renal outcomes unless resolved in a timely manner. IgG4-related diseases characterized by elevated serum IgG4 levels are responsible for a few iRPF cases. However, the underlying immunologic features of most iRPF cases have not been clearly defined, and these cases exhibit varied responses to medical treatment. Thus, we investigated the predictive factors for hydronephrosis-associated outcomes among iRPF patients. Methods. We retrospectively included 18 iRPF patients with hydronephrosis in a tertiary referral hospital from 2012 to 2019. Hydronephrosis improvement was assessed on images taken 6 months after diagnosis. Categorical variables were compared using chi-square or Fisher’s exact test. Continuous variables were compared using Mann–Whitney U-test. Results. On follow-up images, 8 patients (44.4%) showed an improvement in hydronephrosis. Patients with improvement more frequently had reverse serum IgG4/IgG3 ratio (87.5% vs. 30%, p=0.025), abdominal aorta involvement (87.5% vs. 30%, p=0.025) and glucocorticoid treatment administration (87.5% vs. 30%, p=0.025) than those without improvement. The proportion of elevated serum IgG4 level did not differ between the two groups. Even in the 14 cases with normal serum IgG4 levels, reverse serum IgG4/IgG3 ratio was more frequently observed in patients with improvement than in those without improvement (83.3% vs. 12.5%, p=0.026). Conclusion. The reverse serum IgG4/IgG3 ratio was associated with hydronephrosis improvement in iRPF patients, suggesting it to be a suitable serologic marker for predicting favourable responses to glucocorticoid treatment.

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