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Dr West

FAQ: What is Neoadjuvant Therapy and Why Would We Want to Give it?

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The cornerstone of treatment of an earlier stage cancer is a local therapy such as surgery or radiation, which is meant to remove or destroy the cancer that is limited to a specific area. We know, however, that people who have undergone complete resection or what should be complete destruction of a tumor by radiation will too often have their cancer return, sometimes near the area where it first appeared, but often in a distant location.  When we see the cancer recur in a distant site, we can presume that this was mediated by “micrometastatic” disease, circulating tumor cells that were too small to be seen on any scans or by a surgeon directly at the time of surgery, but which must have remained in the body after a good local treatment removed or destroyed all evidence of visible disease. In order to combat this risk and try to treat potential micrometastatic disease, we often give systemic therapy before and/or after the local therapy.  A particularly common approach is to follow surgery with chemotherapy, which is called adjuvant therapy, with adjuvant meaning “helper”.  Systemic therapy before surgery or possibly before radiation is typically termed neoadjuvant therapy, and there are a few reasons why we might prefer to give systemic therapy at the earliest opportunity, rather than having it follow the potentially curative local therapy.

 

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