The third problem is the puncture treatment. This recommendation, most of the time, is made by ultrasound doctors, because, the cyst is beyond them first. Nowadays, many hospitals have ultrasound departments that have set up interventional treatment groups with the urge to puncture. Before the advent of laparoscopy, open surgery was very invasive and puncture was possible for patients located dorsally with a clear cyst wall. But the recurrence rate was high. Now, with laparoscopic surgery so mature and treatment so thorough, there is no need to choose puncture. I have seen to do a case of recurrence after puncture in two cases where the cyst wall was very thick and the surrounding adhesions made separation difficult. The fourth question is whether the cyst will become a kidney tumor. Usually not, but there are cases where tumor is seen at the bottom of the cyst. I have come across a case where the bottom of the cyst was uneven and bulging, and a biopsy was carefully taken, suggesting clear cell carcinoma. Another case is cystic kidney cancer. Therefore, for patients under 70, in good health, with cysts reaching 4 cm, early laparoscopic minimally invasive treatment is more appropriate. After all, the time, financial and psychological cost of observation is not low.