Large Study Recommends Mammograms Beginning at Age 40
Research also finds that self-exams are vital to early detection of breast cancer.
Recent trends in breast cancer detection have wavered. To perform breast self-exams, or not? To get mammograms, or not?
The worry about breast self-exams is that they may skew results into too many false-positive tests. Some who recommend fewer mammograms have suggested that over-screening leads to unnecessary invasive tests and undue anxiety.
However, the 2011 Breast Cancer Symposium of the American Society of Clinical Oncology overwhelmingly supports these preventive measures. The American Cancer Society agrees.
“While there has been ongoing debate about when and how breast cancer screening should occur, this study validates that women who undergo regular mammography screening present at earlier stages and often require less aggressive treatment than those who do not,” said Dr. Jamie Caughran, medical director of the Comprehensive Breast Center at the Lacks Cancer Center in Grand Rapids, MI.
In Pennsylvania, experts predict 10,570 new cases of breast cancer to be diagnosed this year. According to the National Cancer Institute, the annual incidence of breast cancer among women in Montgomery County between 2004 and 2008 was about 139 cases for every 100,000 residents. This places the county above the U.S. rate of 121 cases and the Pennsylvania rate of 125 cases per 100,000 residents.
According to the CDC, as of 2007, 122.6 to 124.8 diagnosis of breast cancer occur in Pennsylvania per 100,000 residents. In our state, 23.3 to 24.3 state residents will die of the disease each year, per 100,000 Pennsylvania residents.
Free breast exams are available through the Pennsylvania Department of Health by calling the Healthy Woman program at 800-215-7494.
The Michigan study, completed this year with data from nearly 6,000 women with breast cancer, counters guidelines by the U.S. Preventative Services Task Force, which recommends generally that women get mammograms every two years beginning at age 50. The USPSTF notes that screenings should be determined on an individual basis.
Among other findings in the Michigan study:
- Breast cancer in women younger than 50 was more likely to be detected first by feel than by mammography. Of the women whose tumors were found by feel, 40 percent were younger than 50.
- Overall, 65 percent of the breast cancer cases were detected by mammography, while 30 percent were detected by feel and the other 5 percent by other methods.
- For women diagnosed with breast cancer before age 50, 49 percent of the cases were detected by mammogram. Of those, 18 percent were Stage 2, and 4 percent were Stage 3.
- For women diagnosed with breast cancer before age 50, 46 percent of the cases were detected by feel. Of those, 50 percent were Stage 2, and 17 percent were Stage 3.
- For women over 50, 81 percent of breast cancers are detected through mammography.
In 2011, ASCO predicts 230,480 new cases of breast cancer for women, 2,140 for men, and 57,650 non-invasive cases. About one in eight women will develop breast cancer, according to ASCO.
“Women of all ages presented with palpable tumors, highlighting the use of self-breast exam as an important public health measure,” Caughran said.