Lymphokine-activated killer cells (LAK) are functional lymphocytes which, after short periods of in vitro liquid culture with interleukin-2 (IL-2), kill a variety of autologous or heterolougous tumor cells both sensitive Lymphokine-activated killer cells (LAK) are functional lymphocytes which, after short periods of in vitro liquid culture with interleukin-2 (IL-2), kill a variety of autologous or heterolougous tumor cells both sensitive