Pengtao Liu, Kaiping Bai, Zhiyuan Zhang, Jie Sun

Analysis of early clinical signs and risk factors for severe hemorrhagic cystitis after stem cell transplantation in children

  • Urology

IntroductionTo analyze the characteristics of early clinical symptoms of hemorrhagic cystitis (HC) after hematopoietic stem cell transplantation (HSCT) and the risk factors of severe HC.MethodsWe retrospectively analyzed 77 children with post‐HSCT HC treated at our hospital between June 2013 and June 2021. Clinical characteristics were collected and catalogued.ResultsAmong the children with urinary tract irritation symptoms (UTIS) as the first symptom, symptoms appeared earlier than hematuria symptoms (28 day vs. 31 day, p = 0.027), and the time progressing to severe HC was significantly longer in these children (12 day vs. 7 day, p = 0.038), but there was no significant difference in the number of participants (57.8% vs. 59.4%, p = 0.889). BK polyomavirus (BKV) infection was an independent risk factor (hazard ratio [HR] = 2.782, p = 0.035) for severe HC, which was also positively associated with multi‐viral infection (HR = 2.215, p = 0.020).ConclusionsIn HC children, when the first urinary tract symptom was UTIS, it appeared earlier than hematuria, and the time of progression to severe HC was significantly longer, suggesting that we still need more aggressive treatment for these children to prevent the worsening of symptoms. The severity of HC was positively correlated with BKV infection and multiple infections.

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