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06.10.2016 | Original Article

IgA nephropathy with presentation of nephrotic syndrome at onset in children

verfasst von: Yuko Shima, Koichi Nakanishi, Masashi Sato, Taketsugu Hama, Hironobu Mukaiyama, Hiroko Togawa, Ryojiro Tanaka, Kandai Nozu, Mayumi Sako, Kazumoto Iijima, Hiroyuki Suzuki, Norishige Yoshikawa

Erschienen in: Pediatric Nephrology | Ausgabe 3/2017

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Abstract

Background

Despite a low incidence, nephrotic syndrome (NS) can present with IgA nephropathy (IgAN). The clinical characteristics and long-term outcomes of pediatric patients with IgAN presenting with NS (NS-IgAN) at onset have not been fully elucidated.

Methods

We retrospectively analyzed 426 patients, and compared clinical and pathological (Oxford) findings between those with NS-IgAN and those with non-NS-IgAN.

Results

Among 426 patients, 30 (7.0 %) had NS-IgAN. Logistic analyses showed that male sex (OR: 7.6, p = 0.0002), M1 (OR: 10.3, p = 0.002), and E1 (OR: 15.2, p = 0.0001) were significantly related to NS. The mean observation period was 6.2 ± 3.2 years. Although NS-IgAN was associated with significantly lower renal survival than non-NS-IgAN according to Kaplan–Meier analysis (p = 0.02), renal survival of NS-IgAN was good (92.4 % at 10 years). The most significant prognostic factor for renal survival was remission of proteinuria after treatment, and NS at onset is also a significant prognostic factor for renal survival after adjusting for remission of proteinuria. Twenty children with NS-IgAN were treated with prednisolone alone, or prednisolone and immunosuppressant. Remission of proteinuria occurred in 21 patients. Three cases of NS-IgAN progressed to stage III–V chronic kidney disease at the most recent observation. They all demonstrated heavy proteinuria after the 2-year initial treatment. The significant factor for persistent proteinuria at 5 years was S1 in NS-IgAN.

Conclusions

The most significant factor for renal survival was responsiveness to treatment, not NS itself. As modifiable acute lesions are the dominant pathological findings in NS-IgAN, histological improvements achieved by appropriate treatments can result in a favorable prognosis.

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Titel: IgA nephropathy with presentation of nephrotic syndrome at onset in children
verfasst von: Yuko Shima
Koichi Nakanishi
Masashi Sato
Taketsugu Hama
Hironobu Mukaiyama
Hiroko Togawa
Ryojiro Tanaka
Kandai Nozu
Mayumi Sako
Kazumoto Iijima
Hiroyuki Suzuki
Norishige Yoshikawa
Publikationsdatum: 06.10.2016
Verlag: Springer Berlin Heidelberg
Erschienen in: Pediatric Nephrology / Ausgabe 3/2017
Print ISSN: 0931-041X
Elektronische ISSN: 1432-198X
DOI: https://doi.org/10.1007/s00467-016-3502-6

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IgA nephropathy with presentation of nephrotic syndrome at onset in children

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Background

Methods

Results

Conclusions

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