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Having reached a statement over the past several decades in the therapy of breast carcinoma, many have turned their attention to methods of earlier diagnosis. Toward this end the utility of survey mammography as a cancer detection method has been widely tested. Female breast have great individual variation in shape, structure, and size. And moreover there are gross and histological changes following menstruation, pregnancy, lactation and menopause. So these physiologic changes are the base in the diagnosis of breast diseases. 53 mammography were performed on 51 patients during the period of January, 1976 to December, 1976 in Ob & Gyn Dept. of Catholic Medical College. The results were as follows: 1) Trabeculation of the fibrous tissue support is prominent on the twelveth day of the cycle. Later, proressive swelling and denseness of firous tissue occurs with loss of trabeculation. Tissue density reaches its height at the beginning of the menses and then regreses. 2) The proliferation of ductal pattern progress during the pregenancy till the postpartum third day and then regressed. During pregnancy & lactation, the detection of pathologic lesion is difficult due to proliferation of ductal pattern. 3) The more advancing age after-menopause is, the more prominent trabeculation becomes, the more ductal pattern regressed and changed to fat. 4) In 9 cases of pathologic findings, 5 cases showed DY type and there was no N1 type. So the DY type breast must be taken more careful examination.
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