Clinical and Experimental Pediatrics

The Korean Pediatric Society (대한소아청소년과학회)
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Clinical manifestations of BK virus infection in pediatric kidney transplant patients

  • Kwon, Yiyoung (Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Kim, Jeong Yeon (Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Lee, Yeonhee (Department of Pediatrics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Cho, Heeyeon (Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine)
  • Received : 2019.04.26
  • Accepted : 2019.09.03
  • Published : 2019.11.15
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Abstract

Background: Polyomavirus BK (BKV) infection is an important cause of graft loss in kidney transplant patients. Purpose: The purpose of this study was to evaluate clinical findings and risk factors for BKV in pediatric patients after kidney transplantation. Methods: This retrospective single-center study included 31 pediatric kidney transplant recipients from January 2002 to December 2017. Two patients received 2 transplantations during the study period, and each transplant was analyzed independently. Total number of cases is 33 cases with 31 patients. BKV infection was confirmed from blood samples via periodic quantitative polymerase chain reaction. Results: The mean age at kidney transplantation was 11.0±4.7 years, and the male-to-female ratio was 2.7:1. Three patients had a past medical history of high-dose chemotherapy and autologous stem-cell transplantation for solid tumors. Nine patients (27.3%) developed BKV infection. The median period from kidney transplantation to BKV detection in blood was 5.6 months. There was no statistically significant difference in estimated glomerular filtration rate between patients with and those without BKV infection. Among 9 patients with BKV viremia, 7 were treated by reducing their immunosuppressant dose, and BKV was cleared in 6 of these 7 patients. In the other 2 BKV-positive patients, viremia improved without immunosuppressant reduction. Conclusion: BKV infection is common in children with kidney transplantation and might not have affected short-term renal function in our patient sample due to early immunosuppressant reduction at the time of BKV detection.

Keywords

References

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