Renal malformation tumor 8mmx7mm, the size is small, usually does not matter, regular review can be. Renal malformation tumor with diameter less than 4cm can be treated conservatively with close follow-up and regular review. However, if the tumor shows symptoms of compression, including compression of the collecting system resulting in fluid accumulation, compression of blood vessels to form renal hypertension, or bleeding and rupture, timely treatment is needed. If the renal stenoma is larger than 4cm, it is better to do surgery to remove the tumor regardless of whether there are symptoms of compression, so as to avoid damage to the renal function when it presses on the capillaries. Therefore, 8mmx7mm renal malformation tumor can be reviewed regularly. If the diameter of the tumor is larger than 4cm or malignancy cannot be ruled out, timely surgical treatment is needed.