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05-05-2024 | Hemolytic Uremic Syndrome | Original article

Adolescence-onset atypical hemolytic uremic syndrome: is it different from infant-onset?

Authors: Kubra Celegen, Bora Gulhan, Kibriya Fidan, Selcuk Yuksel, Neslihan Yilmaz, Aysun Caltik Yılmaz, Beltinge Demircioğlu Kılıç, Ibrahim Gokce, Aslı Kavaz Tufan, Mukaddes Kalyoncu, Hulya Nalcacıoglu, Sare Gulfem Ozlu, Eda Didem Kurt Sukur, Nur Canpolat, Aysun K. Bayazit, Elif Çomak, Yılmaz Tabel, Sebahat Tulpar, Mehtap Celakil, Kenan Bek, Cengiz Zeybek, Ali Duzova, Zeynep Birsin Özçakar, Rezan Topaloglu, Oguz Soylemezoglu, Fatih Ozaltin

Published in: Clinical and Experimental Nephrology | Issue 10/2024

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Abstract

Background

Atypical hemolytic uremic syndrome (aHUS) is a rare, mostly complement-mediated thrombotic microangiopathy. The majority of patients are infants. In contrast to infantile-onset aHUS, the clinical and genetic characteristics of adolescence-onset aHUS have not been sufficiently addressed to date.

Methods

A total of 28 patients (21 girls, 7 boys) who were diagnosed as aHUS between the ages of ≥10 years and <18 years were included in this study. All available data in the Turkish Pediatric aHUS registry were collected and analyzed.

Results

The mean age at diagnosis was 12.8±2.3 years. Extra-renal involvement was noted in 13 patients (46.4%); neurological involvement was the most common (32%). A total of 21 patients (75%) required kidney replacement therapy. Five patients (17.8%) received only plasma therapy and 23 (82%) of the patients received eculizumab. Hematologic remission and renal remission were achieved in 25 (89.3%) and 17 (60.7%) of the patients, respectively. Compared with the infantile-onset aHUS patients, adolescent patients had a lower complete remission rate during the first episode (p = 0.002). Genetic analyses were performed in all and a genetic variant was detected in 39.3% of the patients. The mean follow-up duration was 4.9±2.6 years. At the last visit, adolescent patients had lower eGFR levels (p = 0.03) and higher rates of chronic kidney disease stage 5 when compared to infantile-onset aHUS patients (p = 0.04).

Conclusions

Adolescence-onset aHUS is a rare disease but tends to cause more permanent renal dysfunction than infantile-onset aHUS. These results may modify the management approaches in these patients.
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Literature
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35.
go back to reference Loirat C, Frémeaux-Bacchi V. Atypical hemolytic uremic syndrome. In: Geary FG, Schaefer F, editors. Pediatric kidney disease. 2nd edn. Berlin: Springer; 2016. p. 597–632.CrossRef Loirat C, Frémeaux-Bacchi V. Atypical hemolytic uremic syndrome. In: Geary FG, Schaefer F, editors. Pediatric kidney disease. 2nd edn. Berlin: Springer; 2016. p. 597–632.CrossRef
Metadata
Title
Adolescence-onset atypical hemolytic uremic syndrome: is it different from infant-onset?
Authors
Kubra Celegen
Bora Gulhan
Kibriya Fidan
Selcuk Yuksel
Neslihan Yilmaz
Aysun Caltik Yılmaz
Beltinge Demircioğlu Kılıç
Ibrahim Gokce
Aslı Kavaz Tufan
Mukaddes Kalyoncu
Hulya Nalcacıoglu
Sare Gulfem Ozlu
Eda Didem Kurt Sukur
Nur Canpolat
Aysun K. Bayazit
Elif Çomak
Yılmaz Tabel
Sebahat Tulpar
Mehtap Celakil
Kenan Bek
Cengiz Zeybek
Ali Duzova
Zeynep Birsin Özçakar
Rezan Topaloglu
Oguz Soylemezoglu
Fatih Ozaltin
Publication date
05-05-2024
Publisher
Springer Nature Singapore
Published in
Clinical and Experimental Nephrology / Issue 10/2024
Print ISSN: 1342-1751
Electronic ISSN: 1437-7799
DOI
https://doi.org/10.1007/s10157-024-02505-7

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