Using RT-qPCR we demonstrated that RNA corresponding to the major oncogenic WT1 isoforms was more abundant in the KS-involved lymph node than in a control lymph node (Fig 2B), specifically isoforms A and D. We confirmed overexpression of total WT1 in an additional KS specimen using RT-qPCR, and in addition isoforms C and D. RT-qPCR for viral genes, including latent (LANA and vFLIP), as well as lytic (K8.1), was performed to assess viral gene expression. This evidence concerns the gene WT1 and Kaposi's sarcoma.