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    796367
    Peer Reviewed

    [Oral contraceptives and the risk of cancer (author's transl)] P-piller och cancerrisk.

    Gustafsson JA; Hagenfeldt K

    LAKARTIDNINGEN. 1979 Apr 25; 76(17):1625-7.

    An overview of the risk of developing cancer related to oral contraceptive (o.c.) use is presented. A committee of experts affiliated with WHO studied the problem of developing cancer related to o.c. use. O.c. use for more than 2 years prevents the formation of benign breast tumors, even after discontinuing o.c. use. The effect is due to the progestin component. There is no clear indication that o.c. use increases the risk of breast cancer. A higher risk of endometrial cancer is associated with sequential preparation use, but not with the use of combination preparations. Cervical neoplasms and pituitary adenoma may be more frequent among predisposed women who use o.c.s. Studies show a reduced risk of ovarian cancer with o.c. use, but more studies are necessary. There is a marked increase in the relative risk of developing hepatocellular adenoma among women who use o.c.s for longer than 3 years. The risk increases with the hormone dosage, the duration of treatment, and the age of the patient. There is no reliable data to indicate that the risk of malignant melanoma increases with o.c. use. More study is needed to determine the possible cancer risks of injection preparations. Combination preparations can cause an increased risk of vaginal epithelial metaplasia. Diethylstilbestrol taken during early pregnancy can cause vaginal neoplasms in the offspring. More epidemiological studies and clinical and laboratory studies on the carcinogenic effects of o.c.s and the endocrinological effects of o.c.s on younger women should be undertaken. It is recommended that o.c.s with the lowest possible hormone dosages be used. O.c.s should not be prescribed to women with vaginal adenosis. (Summary in ENG)
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