KS tumor biopsies from 294 PLWH and advanced stage AIDS-Kaposi sarcoma in a multinational clinical trial (ACTG A5263/AMC 066; NCT01435018) [54] were sectioned for H&E, and immunohistochemistry (IHC) for WT1 and LANA was performed (Fig 1A). The gene discussed is WT1; the disease is Kaposi's sarcoma.