title: Co-incident BK and Epstein-Barr virus replication in a 3-year-old immunocompetent boy.
abstract: We present a unique case of infectious mononucleosis attended with transient asymptomatic BK virus (BKV) manifestation in the urine of an immunocompetent caucasian boy without kidney dysfunction. The urine sediment showed abundant decoy cells initially misdiagnosed as malignant cancer cells. This case demonstrates that the occurrence of polyoma-BKV bearing decoy cells is self-limiting and not necessarily associated with overt kidney disease in an immunocompetent child. The shedding of decoy cells into the urine might be promoted by viral co-infections modulating the host's immune response such as infectious mononucleosis.
authors.forename: Christian
authors.initials: C
authors.lastname: Breuer
authors.forename: Andrea
authors.initials: A
authors.lastname: Hinsch
authors.forename: Johannes
authors.initials: J
authors.lastname: Hiort
authors.forename: Jun
authors.initials: J
authors.lastname: Oh
authors.forename: Hans H
authors.initials: HH
authors.lastname: Hirsch
authors.forename: Peter
authors.initials: P
authors.lastname: Dalquen
mesh_terms: D001739:BK Virus / Q000302:isolation & purification*; D002675:Child, Preschool; D060085:Coinfection; D003937:Diagnosis, Differential; D004854:Herpesvirus 4, Human / Q000302:isolation & purification*; D006801:Humans; D007244:Infectious Mononucleosis / Q000175:diagnosis* / Q000652:urine; D007680:Kidney Neoplasms / Q000652:urine; D008297:Male; D027601:Polyomavirus Infections / Q000175:diagnosis* / Q000652:urine; D019562:Viral Load; D014779:Virus Replication