Based on several con: The numbers of chemo cycles depends on patient's tumor type and on the type of response observed. If the cancer does not respond to a chemo regimen, we stop and change chemo to a new set of drugs. If the tumor responds, chemo continues as long as the tumor is responding yet it is not compeltely gone. Tumors may respond and then start progressing all over agin. This will call for a change of chemo.
Answered 10/4/2016
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