Objective Through culturing breast cancer cells in vitro, and applying common chemotherapy drug sensitivity testing to provide clinical reference and choice of chemotherapy drugsto reduce the clinical chemotherapy choice blindness and get better implementation of individual treatment. Methods MTT method was applied in testing susceptibility of the tumor cells and tumor cells cultured in vitro in surgical resection of lung cancer(13 cases), esophageal cancer(4 cases). Results 16 kinds of chemotherapeutic dru...