DCIS: Surgical Breast Conservation (Lumpectomy) 
= Mastectomy results

Breast conserving surgery, long known to be successful at treating the more common invasive cancer, can also be effective for this pre-invasive condition - ductal carcinoma in situ.

Accounting for 22% of all breast cancer diagnoses DCIS affects about 62,000 women each year in the US.

In this study, researchers at U-M and William Beaumont Hospital in Royal Oak, Mich. ( study author Renee Pinsky, MD, assistant professor of radiology at the University of Michigan Medical School), looked at the records of women who had opted for lumpectomy and radiation for DCIS between 1981 and 2003.

Of the 513 women studied, only 8% developed a recurrence of breast cancer or DCIS. Of those recurrences, 97% were detected by mammography, and 91% were diagnosed exclusively by mammography, suggesting that regular follow-up mammograms are a reliable way of detecting any return of cancer after breast-conserving surgery.

The majority of recurrences involved another non-invasive cancer. Among those women who did develop invasive breast cancer, two-thirds had tumors smaller than 1 cm, which is considered to be small. All recurrences were stage 0 or 1, the least-advanced and most easily treated stages, which are associated with the best prognosis.

These findings were presented at the American Roentgen Ray Society annual meeting in Vancouver, British Columbia, Canada in May 2006

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