The study was observational, Hwang stressed. It found a link or association but could not provide cause-and-effect proof that the breast-conserving treatment is more effective than mastectomy in early stage breast cancer.
Hwang believes the study does arm women with valuable information. However, "I don't want women who chose mastectomy to think they did the wrong thing," Hwang said. "At the end of the day, personal preference trumps everything else. I fully support the patient's options to choose the best treatment for themselves."
To learn more about lumpectomy, visit the American Cancer Society.
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