4.4 Article

Clinical outcomes in pediatric patients with normal renal histopathology

期刊

KIDNEY RESEARCH AND CLINICAL PRACTICE
卷 41, 期 1, 页码 58-65

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KOREAN SOC NEPHROLOGY
DOI: 10.23876/j.krcp.21.091

关键词

Biopsy; Child; Hematuria; Proteinuria

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This study analyzed the incidence and clinical outcomes of children who showed normal histopathological findings in their percutaneous renal biopsies (PRBs). The results showed that most children with normal PRB histopathologic findings had improved urinary abnormalities during the follow-up period, and none of them developed end-stage renal disease.
Background: There have been some cases where abnormal histopathologic findings could not be found in the kidney could even with proper specimen collection through percutaneous renal biopsy (PRB) in accordance with its indication. We analyzed the incidence and clinical outcomes of children who showed normal histopathological findings in their PRBs. Methods: The medical records of 552 pediatric subjects who underwent PRB between 2005 and 2016 were reviewed. Twenty-six subjects were excluded because allograft biopsy was performed in nine subjects, and the age at biopsy was greater than 18 years in 17 subjects. Finally, 526 subjects were enrolled in this study. Results: Of the 526 pediatric patients, 32 (6.1%) showed no histopathological abnormalities in their PRBs. The male-to-female ratio of the patients was 1.9:1, and the mean ages at the first visit and at biopsy were 10.6 +/- 4.1 and 11.4 +/- 3.8 years, respectively. In accordance with the biopsy indications, recurrent gross hematuria showed the highest incidence rate, but combined hematuria and proteinuria had the lowest incidence rate regarding normal renal histopathology among all the subjects. At a mean follow-up of 35.5 +/- 23.6 months, urinary abnormalities had improved in more than 50% of the subjects with normal renal histopathology, and none of the patients showed progression to end-stage renal disease or required rebiopsy due to symptom worsening during the follow-up period. Conclusion: The clinical outcomes of children with normal PRB histopathologic findings are generally good. Further studies to evaluate their long-term outcomes are needed.

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