"Much of the debate over when to start having mammograms has focused on lives saved but new research suggests that early screening might also translate into smaller tumors and less aggressive breast cancer treatments. There are multiple benefits of mammography in terms of early detection. Not only do we save lives but we reduce the likelihood of needing more aggressive treatment said study author Dr. Elisa Port. She directs the Dubin Breast Center at Mount Sinai and is chief of breast surgery at Mount Sinai Hospital both in New York City.  Currently the U.S. Preventive Services Task Force recommends that biennial screenings start at age  for most women while the American Cancer Society advises that annual screenings begin at age . Earlier guidelines had suggested annual screenings begin at age . Port noted that screening guidelines tend to be based on the ability of mammograms to save lives and how often they give a false positive result. But isnt there some benefit to getting tested earlier like needing fewer lymph nodes removed and not needing chemotherapy I think its safe to say that most women if they could be assured the same survival would choose not to get more aggressive therapies she said. Ports study included more than  women diagnosed with breast cancer at the Dubin Breast Center. All of the women were older than .  The women were separated into two groups. One group had a mammogram within the  months before their breast cancer diagnosis. The other group had a screening  months or more before their diagnosis. The second group also included women who had never had a mammogram. Women in the second group were  percent more likely to need chemotherapy. They were also  percent more likely to need surgery to remove the whole breast mastectomy and  percent more likely to need lymph nodes removed. And the women who were screened earlier had smaller tumors. Port also looked at the  to yearold age group and found those who had never had a mammogram were much more likely to need chemotherapy. They were also more likely to have larger tumors by  millimeters on average and to need a mastectomy than those in the  months or less group. But only  women fell into the never had a mammogram group. However the study did not prove a causeandeffect link between earlier mammograms and smaller tumors and less aggressive treatment. And Dr. Len Lichtenfeld deputy chief medical officer for the American Cancer Society noted that this was an observational study that only looked at the experience of one institution. Still the observations are consistent with what we have seen with the value of early detection. Clearly the earlier a breast cancer is diagnosed the less treatment that will be required. But this study doesnt tell us about longterm outcomes or what transpired over a long period of time he said. Also because of the nature of the study and the small sample size in the young age group subanalysis Lichtenfeld said that this cannot be interpreted as a study telling us what age to start mammograms. The study is to be presented Thursday at the American Society of Breast Surgeons meeting in Orlando Fla. Findings presented at meetings are typically viewed as preliminary until published in a peerreviewed journal.  More information Learn more about mammography screening guidelines from the American Cancer Society https SOURCES Elisa Port M.D. director Dubin Breast Center at Mount Sinai and chief breast surgery Mount Sinai Hospital New York City Len Lichtenfeld M.D. deputy chief medical officer American Cancer Society May   presentation American Society of Breast Surgeons meeting Orlando Fla."