Cytoreduction

It is the debulking, or reduction «(...) of the size of, a cancerous tumor. Surgery and radiation therapy are two common cytoreductive treatments used to debulk tumors. Debulking means to remove as much of the cancer as possible [1].» «(...) "cytoreduction" refers to reducing the number of tumor cells [2].» «Tumor debulking may increase the chance that chemotherapy or radiation therapy will kill all the tumor cells. It may also be done to relieve symptoms or help the patient live longer [3].» 

Bibliographic references:

[1] CancerCenter.com. (2017). Cytoreductive Therapy : Cancer Glossary | CTCA. [online] Available at: http://www.cancercenter.com/terms/cytoreductive-therapy/ [Accessed 15 May 2017].

[2] En.wikipedia.org. (2017). Debulking. [online] Available at: https://en.wikipedia.org/wiki/Debulking [Accessed 15 May 2017].

[3] National Cancer Institute. (n.d.). NCI Dictionary of Cancer Terms. [online] Available at: https://www.cancer.gov/publications/dictionaries/cancer-terms?cdrid=46635 [Accessed 15 May 2017].