I develop microdevices that are implanted directly into tumors and measure how the tumor responds to 30 different chemotherapies. These devices carry microdoses of each therapy which are released into small confined regions of tumor. Each therapy interacts with the tumor in its native microenvironment. The effect of each therapy is then assessed using a variety of readouts, including immunohistochemistry, mass spectrometry and RNAseq. This data can then be used to identify which therapy works optimally for a given patient.