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This is an interim report by a team studying the appropriateness and effectiveness of breast cancer screening for reducing mortality in women aged under 50. The Miyagi Trial showed that the breast cancer detection rate for women in their 40's was higher by mammography (0.15%) than by inspection and palpation (0.11%), and was also higher in women aged 50-69 years (0.09% and 0.13 %). The detection rate by mammographic screening was 0.20% in both age groups, suggesting that mammographic screening might be effective for women in their 40's. Mammograms of women younger than 50 revealed a greater degree of heterogeneity and high breast density than those of women over 50 (85% and 64%, respectively). The optical density set of the breast by the automatic exposure control (AEC) system, changing from 1.25 to 1.50, was reduced in the high density group.<BR>That pointed out the importance of quality control of the mammography. Ultrasonic screening, including the methods, apparatus, and criteria necessary for a thorough examination, was varied by the technician in charge. Studies are now being conducted on the criteria for thorough examination and training methods. We also made a comparison between the cost and effectiveness of cancer screening by mammography and ultrasonography. It was found that the cost of extending one-year survival in women aged between 40 and 49 was ¥ 1, 092, 000 for mammographic screening, ¥ 1, 872, 000 for ultrasonic screening, and ¥ 1, 457, 000 for screening by inspection and palpation.Therefore, mammographic screening was least expensive, and ultrasonic screening was the most expensive. However, it will be necessary to collect more data for ultrasonic screening.
- 日本乳癌検診学会の論文
日本乳癌検診学会 | 論文
- Characteristics of Patients with Interval Breast Carcinomas.
- Evaluation of Mass Screening for Breast Cancer Conducted under the Health and Medical Service Law for the Elderly and the Actual Conditions of Health Insurance Administration in Zentsuji City.
- Two Cases of Mucinous Carcinoma of the Breast Manifested as Interval Cancer.
- Breast-Conserving Therapy for Breast Cancer Patients Showing Mammographic Evidence of Calcification.
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