CCNK and primary effusion lymphoma: The latency genes K-cyclin and LANA, homologs of MHV68 v-cyclin and mLANA, are expressed in all KSHV-associated maglinancies, Kaposi's sarcomas (KS), primary effusion lymphomas (PEL) and multicentric Castleman's diseases (MCD) [35], [36], [37], [38].