Polyoma (BK) virus associated urothelial carcinoma originating within a renal allograft five years following resolution of polyoma virus nephropathy Academic Article uri icon


MeSH Major

  • Allografts
  • BK Virus
  • Carcinoma, Transitional Cell
  • Kidney Neoplasms
  • Kidney Transplantation
  • Polyomavirus Infections
  • Tumor Virus Infections


  • A direct role for BK polyomavirus infection in malignant tumors of renal allografts and urinary tract is emerging. Case reports suggest a link between BK virus (BKV) reactivation and development of malignancy in renal allograft recipients. Herein we describe the first case of BKV positive invasive urothelial carcinoma within the renal allograft, presenting with chronic diarrhea and weight loss 5 years following resolution of BK viremia/nephropathy (BKVN). Unique to our case was the remote history of BK viremia/BKVN, rising titer of anti-HLA antibody and presence of renal limited urothelial carcinoma with microinvasion of malignant cells staining positive for SV40 large T antigen (T-Ag). These findings suggest that persistence of subclinical BKV infection within the renal allograft may play a role in the malignant transformation of epithelial cells. Patients with history of BKVN may be at risk for kidney and urinary tract malignancy despite resolution of BK viremia/BKVN.

publication date

  • January 2016



  • Academic Article



  • eng

Digital Object Identifier (DOI)

  • 10.5414/CN108410

PubMed ID

  • 26709521

Additional Document Info

start page

  • 179

end page

  • 83


  • 85


  • 3