Studies suggest metastases may respond to different drugs than the primary tumor.By Chris Palmer
Metastasis occurs when cancer cells leave the original tumor and move through the blood or lymphatic systems to other parts of the body. Scientists had initially assumed that metastases would contain cells that were the same as those in the primary tumor. Studies suggested this was not necessarily the case. Now, new technologies are allowing researchers to learn even more about how metastases differ from primary tumors.
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