Of 279 tumors collected from cattle from 1964 to 1971 the commonest malignant epithelial tumor was liver cell carcinoma. It occurred in 0.014% of slaughtered cattle and in 0.081% of slaughtered cows. The concurrence of carcinoma and biliary cirrhosis in all our cases where there was damage caused by Fasciola hepatica suggests a causal pathogenetic relationship. This could also explain the frequent localisation of carcinoma in the left lobe, which is often the site of most damage in fascioliasis.
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