Newly Diagnosed / Your Questions Click a letter to see a list of topics beginning with that letter ABCDEFGHIJKLMNOPQRSTUVWXYZ Radiation Is radiation really necessary after a lumpectomy? Many studies have found that radiation reduces a woman's risk of having the tumor come back in the breast. (This is called a local recurrence.) These studies found that when a woman does not have radiation she has a risk of recurrence of around 30%. If she does have radiation, her risk is reduced to about 7%. Some studies have shown that older women (women who are 70 and over) and have small tumors that are estrogen receptor (ER)-positive, and take the drug tamoxifen may not need radiation. You can read more about this here.
You can read more about the different types of radiation treatments that are used here.
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