Left renal malignant tumor is a common benign tumor of the kidney, and its severity is related to the size of the tumor and the presence of complications. Generally, it is not serious. Renal staggered tumor, also called renal vascular smooth muscle lipoma, is a common benign tumor of the kidney. The vast majority of renal malformations are small and usually have no clinical manifestations. This is not a serious condition and generally does not require special treatment, clinical observation and regular review can be done. However, a small number of renal malformations are too large and may compress the kidneys; or the malformations may rupture, resulting in back pain, hematuria, abdominal pain and other symptoms. In this case, you need to actively receive treatment for tumor removal or even nephrectomy. Therefore, after diagnosed with left renal staggered tumor, you should go to the hospital as soon as possible and choose different treatments according to your condition.