Polyomavirus-Associated Nephropathy, also known as polyomavirus associated nephropathy, is related to viral infectious disease and interstitial nephritis. An important gene associated with Polyomavirus-Associated Nephropathy is NDUFB4 (NADH:Ubiquinone Oxidoreductase Subunit B4), and among its related pathways/superpathways are Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell and Cancer immunotherapy by PD-1 blockade. Affiliated tissues include kidney and pancreas.