Evaluation of the risk factors for BK virus‐associated hemorrhagic cystitis in pediatric bone marrow transplantation patients: Does post‐transplantation cyclophosphamide increase the frequency?

BKV-HC is an essential complication of HSCT primarily associated with Cy use, the presence of aGVHD, and donor relatedness. The present study shows that the use of Cy in the post-transplantation period further increases BKV-HC risk in pediatric patients, regardless of dose.