A growing number of women with early stage breast cancer seem to be choosing to have the whole breast removed instead of just the cancerous lump, doctors are reporting.
Mastectomies were standard treatment until 1990, when studies showed that women whose cancers were small and confined to the breast did just as well if they had less radical surgery followed by radiation. That set a trend of more women choosing breast-conserving treatment.
Now, a study of about 5,500 women at the Mayo Clinic in Rochester, Minn., shows that mastectomies are on the rise. Doctors say there are signs this is happening elsewhere around the country, too.
“We really don’t have a lot of data on why,” said Dr. Julie Gralow, a cancer specialist at the University of Washington in Seattle. However, she said, it may be that newer tests like MRI scans are finding more cancers, or flagging so many suspicious spots that women want the breast removed just for peace of mind.
The study was released Thursday by the American Society of Clinical Oncology and will be presented at the group’s annual meeting later this month.
In the Mayo Clinic study, about 45 percent of breast cancer patients chose mastectomies in 1997. That declined to only 30 percent in 2003, then started to rise. By 2006, 43 percent were opting for the more radical treatment.
The rise coincided with wider use in the clinic of MRI, or magnetic resonance imaging. Studies show it can detect far more breast abnormalities than ordinary mammograms but it also gives a lot of false alarms.
Women who had MRIs were more likely to choose mastectomy than those who did not have the test, although a rise was seen in both groups.