Usefulness of Breast Cancer Mass Screening Using Ultrasonographic Whole-Breast Scanning in All Individuals.
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We compared breast cancer cases detected by mass screening using a combination of physical examination and real-time ultrasonographic whole-breast scanning of all individuals (hereafter referred to as the mass group ; 48 cases) with self-recognized cases of breast cancer (hereafter referred to as the clinic group ; 91 cases) that were treated surgically within the same period. A significantly higher proportion of the mass group (91.7%) had cancers that were detected at stage I of the TNM classification compared with the clinic group (p<0.01), and all premenopausal women in the mass group were revealed to have stage I tumors, which was significantly better than in the clinic group (p<0.05). Moreover, a significantly higher proportion of the mass group (20.8%) had non-palpable breast cancer compared to the clinic group (p<0.05), and the five-year and ten-year survival rates of the mass group were significantly better than in the clinic group.<BR>Cases of non-palpable breast cancer detected as only a small hypoechoic area on ultrasonography accounted for 16.7% in the mass group. Among these cases, 25.0% were noninvasive carcinoma and 75.0% were invasive carcinoma. In the mass group, repeating participants (56.3%) tended to outnumber primary participants (43.7%). Also, non-palpable breast cancers tended to be detected more often by ultrasonography alone in repeating participants (22.2%) than primary participants (9.5%). Moreover, the majority of cancers in repeating participants (3.7%) tended to stay at early stage I, whereas 14.3% of those in primary participants showed aggravation from stage II to worse. Therefore, we confirm that it is important to perform breast cancer mass screening every year by ultrasonographic bilateral whole-breast scanning of repeating participants, and of course primary participants.
- 日本乳癌検診学会の論文
日本乳癌検診学会 | 論文
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