Renal Outcomes of Childhood IgA Nephropathy and Henoch Schönlein Purpura Nephritis

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Thanaporn Chaiyapak
Anirut Pattaragarn
Suroj Supavekin
Nuntawan Piyaphanee
Kraisoon Lomjansook
Julaporn Pooliam
Achra Sumboonnanonda

Abstract

Background: Henoch-Schönlein purpura nephritis (HSPN) is considered the systemic form of IgA nephropathy (IgAN). However, differing clinicopathological features and renal outcomes of children with IgAN and HSPN have been reported in some studies.


Methods: This study retrospectively reviewed children with IgAN and HSPN younger than 18 years, between January 2004 and December 2015. The clinicopathological characteristics at diagnosis and the renal outcomes after at least 1 year of follow-up were compared between the two groups.


Results: A total of 54 children, comprising 21 with IgAN and 33 with HSPN, were recruited. The children with HSPN were younger than the children with IgAN. Gross hematuria and nephritic syndrome at the initial presentation were more common in children with IgAN. Regarding the pathological findings, IgAN had greater chronicity than HSPN. After a median follow-up period from first presentation to renal outcomes measurement of 4.0 years (1.3-12.2) in children with IgAN and 4.2 years (1.1-11.4) in children with HSPN, the renal outcomes were better in the latter group. The incidence of chronic kidney disease (CKD) was 28.6% in children with IgAN and 6.1% in children with HSPN (p = 0.02). Complete recovery was observed more frequently in children with HSPN than in children with IgAN (57.1% in IgAN vs. 87.9% in HSPN, p = 0.01).


Conclusions: Childhood IgAN has greater chronicity and worse renal outcomes than childhood HSPN, with a lower rate of complete recovery and a higher frequency of CKD. We recommend long-term follow-up for CKD in children with IgAN.

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How to Cite
Chaiyapak, T. ., Pattaragarn, A. ., Supavekin, S. ., Piyaphanee, N. ., Lomjansook, K. ., Pooliam, J. ., & Sumboonnanonda, A. . (2021). Renal Outcomes of Childhood IgA Nephropathy and Henoch Schönlein Purpura Nephritis. Siriraj Medical Journal, 73(10), 687–694. https://doi.org/10.33192/Smj.2021.88
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Original Article

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