Tumour EBV status was related to EBV antibody titres, spontaneous and concanavallin A induced blood lymphocyte DNA synthesis, serum levels of soluble (s) CD4, sCD8, sCD25, sCD30, sCD54, β2-microglobulin, thymidine-kinase, routine chemistry, patient characteristics, complete remission and survival. Here, CD4 is linked to neoplasm.