一项最新研究表明,40多岁女性的乳腺密度与肿瘤生长更迅速的倾向可增加乳房 X 线筛查结果呈阴性后罹患乳癌的可能性。来自于美国西雅图 Fred Hutchinson 癌症研究中心的 Emily White 教授报道说,研究发现乳腺密度是年轻妇女与年老妇女相比的乳房 X 线照相灵敏性较差的原因之一;但并不能因此推论乳腺致密的女性应接受更频繁的筛查。White 及其同事对1988～1993年间被确诊的侵袭性乳癌的73例40～49岁的女性和503例50岁以上的女性进行了研究。年轻妇女乳房 X 线照相呈阴性或良性病变后的12～24个月内被确诊为癌症的比率分别为27.7%和52.1%;年老女性分别为13.95%和24.7%。肿瘤 A new study shows that breast cancer density and tumor growth more rapidly in women in their forties increase the likelihood of breast cancer after a mammographic negative. Professor Emily White from Fred Hutchinson Cancer Research Center in Seattle reported that the study found that breast density was one of the causes of poor mammography sensitivity in young women compared to older women; however, it can not be deduced that breast density Women should receive more frequent screening. White and colleagues studied 73 women aged 40 to 49 years and 503 women over 50 years of age who had been diagnosed with aggressive breast cancer from 1988 to 1993. Young women were diagnosed with cancer within 12-24 months after the mammogram was negative or benign lesions were 27.7% and 52.1%, respectively; young women were 13.95% and 24.7% respectively. Tumor