K8.1 expression was increased in the iSLK BAC-16 treated with 1mM sodium butyrate and 1μg/ml doxycycline, but expressed at low levels in the tissue involved by KS, most consistent with a largely latent state in vivo expressing increased levels of WT1 and oncogenic isoforms compared to lymph node control tissue. This evidence concerns the gene KRT81 and Kaposi's sarcoma.