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F INTRODUCTION:Hypercholesterolemia is one of the important paraneoplastic syndromes in patients with hepatoma(s), but the nature of the defect has not been completely elucidated.We investigated the molecular mechanisms of hypercholesterolemia in a bepatoma-bearing rat model.METHODS:Buffalo rats were implanted in both flanks with Morris hepatoma 7777 (McA-RH7777) cells.After 4 weeks, the animals and untreated control rats were sacrificed and the tumors, liver and blood were collected from each rat.