We assessed the feasibility of using lymphokine-activated killer cells (adoptive immunotherapy) with infusions of interleukin-2 when given regionally in three patients with unresectable primary hepatocellular carcinoma (PHC). In 2 patients, 2 cycles, which included a bolus of LAK (10(7) to 10(8) cells followed by a 4-hourly infusion of IL-2 were administered via selective arterial catheterization of the hepatic artery. One further patient received 3 cycles of IL-2 alone by direct intralesional and perilesional injections. Minimal toxicity was observed and side effects such as fever were comparable to those observed with systemic infusions of IL-2 alone. Serial alpha-fetoprotein (AFP) levels initially fell but subsequently rose within 2 to 4 weeks of therapy. AFP levels had not reached pre-treatment values at 4 months in 2 patients, 1 of whom was alive and well at 15 months follow-up.
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