Chemo-sensitive is that the tumor shrinks or even disappears after the tumor patient is treated with chemotherapy drugs, which indicates that the tumor is more sensitive to chemotherapy drugs and the treatment is effective. The opposite of chemo-sensitive is chemo-resistant, which means that the tumor has almost no reaction to chemotherapy drugs and has no effect. Tumors that are more sensitive to chemotherapeutic drugs commonly include choriocarcinoma, small cell lung cancer and so on. Tumors resistant to chemotherapy include kidney cancer and thyroid cancer, so chemotherapy drugs are not recommended for such tumors. If the tumor is diagnosed, one should consult regular hospitals and follow the doctor’s instructions for standardized treatment to improve the patient’s quality of life and prolong the survival time limit.