“…Low NK cell activity has frequently been reported in active HD (Berenyi et al, 1986;Frydecka, 1985;Hawrylowicz et al, 1982;Levy et al, 1984;Komiyama et al, 1987;Tursz et al, 1982). The cytotoxic activity of lymphokine activated killer (LAK) cells, a promising candidate for adoptive immunotherapy of metastatic cancers, has been studied in various solid tumours and in some haematological malignancies like leukemia and nonHodgkin's lymphoma (NHL) (Dawson et al, 1986;Oshimi et al, 1986;Lotzova, 1987;Rajaram et al, 1990;Tatake et al, 1989) but not so far in HD.…”