A tumor cell content of 30% is usually pathologically described as a proportion of tumor cells of 30% of all cells in the field of view. Tumor Cell 30% represents different meanings in different test results. In tumor histopathology, tumor cell 30% suggests that the sample obtained contains 30% tumor cells. A higher percentage usually represents a more pronounced proliferation and invasion of tumor cells, representing a higher degree of malignancy of the tumor. For tumor tissue, 30% is usually lower, and in the case of paraneoplastic tissue, it indicates that the tumor has infiltrated into the surrounding area. If 30% of tumor cells are detected when tumor patients undergo PDL1 immunohistochemistry, it usually indicates that 30% of tumor cells are positively expressed, which is a medium-low expression, and it can indicate the degree of response to immunotherapy. It is recommended to go to a regular hospital to complete the relevant examinations, assess the condition, and clarify the condition and treatment under the guidance of the doctor, so as to avoid delaying the condition.