A quadrantectomy, also referred to as a segmental or partial mastectomy, is a surgical procedure for breast cancer in which one quarter of breast tissue is removed along with muscles of the chest wall within a 2 to 3 centimeter radius of a tumor. This procedure is an alternative to a radical or simple mastectomy, in which an entire breast is removed.
In a study that followed patients who underwent this procedure, it was found that only 9% of people who had a quadrantectomy experienced a relapse of the cancer.
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Quadrantectomy Wikipedia(Text) CC BY-SA