A preliminary study has shown that the hormone-similar, growth-retarding drug octreotide can prolong survival time in patients with primary liver cancer. Due to methodological deficiencies of the preliminary study the results will be re-checked by the comparison of octreotide with an pseudo-drug (so-called placebo) primarily regarding to the survival time and secondarily concerning costs, side effects, patient cooperation and quality of life as well as specific conditions in the tumor tissue in both groups with 108 patients with primary liver cancer.