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  • Title: Modern oral contraceptive use and benign liver tumors: the German Benign Liver Tumor Case-Control Study.
    Author: Heinemann LA, Weimann A, Gerken G, Thiel C, Schlaud M, DoMinh T.
    Journal: Eur J Contracept Reprod Health Care; 1998 Dec; 3(4):194-200. PubMed ID: 10036602.
    Abstract:
    OBJECTIVE: To analyze the association between oral contraceptive use and the risk of benign liver tumors. METHODS: Two parallel case-control studies on hepatocellular adenoma and focal nodular hyperplasia. Collaborative study of 15 German liver centers. Cases defined by histology and compared with population controls. RESULTS: Fifty-one hepatocellular adenoma and 143 focal nodular hyperplasia cases (women) were recruited between 1990 and 1997, and compared to 240 population controls with a recent abdominal imaging test. The frequency age-matched odds ratio was 1.25 (95% confidence interval (CI), 0.37-4.22) and 1.96 (95% CI, 0.85-4.57) for hepatocellular adenoma and focal nodular hyperplasia, respectively. For hepatocellular adenoma, there was neither a significantly increased risk with longer duration of oral contraceptive use, nor an association with time since first or last use. For focal nodular hyperplasia, however, a slightly increased odds ratio was found with longer duration of use and more recent last use. CONCLUSION: There is little evidence for an increased risk for hepatocellular adenoma in women using modern oral contraceptives. If there is a risk not detected by the limited study size, hepatocellular adenoma is an extremely rare, and focal nodular hyperplasia a rare, adverse effect potentially associated with long-term oral contraceptive use and likely to be without public health importance.
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