Kidney tumor 27mm is not big, but the severity of the tumor and the treatment method not only refer to the size, found abnormal, should follow the physician’s advice treatment. Kidney tumors, if benign tumors, such as renal vascular smooth muscle tumors, if there is no back pain and other discomfort, generally do not need special treatment, 27 mm is not big, but should be regularly reviewed to monitor the size of the change, found changes in early treatment. If malignant tumor is considered, according to the staging standard of kidney cancer, if there is no metastasis, tumors less than or equal to 7cm belong to stage I, that is, early stage tumors, so 27mm is not that big, but malignant tumors no matter how big or small should be dealt with as early as possible. Although 27mm is not a big tumor, it does not mean that the condition is light and easy to treat, it should be combined with the pathological type of the tumor, whether there is metastasis, the speed of progress, etc. Small tumors with a high degree of malignancy may also progress rapidly and be difficult to be cured. Once a tumor lesion is found, no matter how big or small it is, it should be treated in accordance with the physician’s opinion, and should not be neglected to avoid delaying the condition.