3 doctors weighed in:

Why do so many chemo's fail to shrink cancer cells in some people? Would radiation do a better job? (such as with colon cancer, stage 4)?

3 doctors weighed in
Dr. Johnny Green
Surgery - Colorectal
2 doctors agree

In brief: Dna of tumor

There is a wide variation in the aggressiveness and tumor responsiveness from one patient to another and even in the same patient's tumor over time.
Tumors have been shown to change their dna over time, changing the effectiveness of chemotherapy to kill the cancer cells. Radiation is limited by the location and sensitivity of surrounding local tissues to radiation damage.

In brief: Dna of tumor

There is a wide variation in the aggressiveness and tumor responsiveness from one patient to another and even in the same patient's tumor over time.
Tumors have been shown to change their dna over time, changing the effectiveness of chemotherapy to kill the cancer cells. Radiation is limited by the location and sensitivity of surrounding local tissues to radiation damage.
Dr. Johnny Green
Dr. Johnny Green
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