Researchers report no difference in breast cancer characteristics after oophorectomy

More than half a million women in the United States undergo a hysterectomy each year and approximately half of those surgeries include removal of the ovaries. Researchers know that removing a woman's ovaries is associated with a reduction in the risk of developing breast cancer, but it has not been clear whether those cancers that do arise in these women differ from breast cancers in the general population. Now, investigators at Fox Chase Cancer Centre report that women who have had a bilateral oophorectomy tend to have smaller tumours and to have their tumours detected by mammography rather than by physical exam. The use of hormone therapy after surgery, however, wipes out any difference in tumour size or detection method...

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