The number of years a patient with left kidney cyst can live is related to the type of cyst and the severity of the patient’s condition, which should be analyzed in a specific way and cannot be generalized. If it is a simple renal cyst and the cyst is small, no damage to the kidney, mostly caused by inflammation, congenital developmental abnormalities, etc., the patient usually has no life threatening and can survive for a long time. If it is a multiple renal cyst with large cyst or with bleeding and infection, it may progress to renal failure, which will endanger the patient’s life and needs to be treated timely through needling, drainage and surgical removal, etc. If treated properly, the patient may survive for more than 10 years, but there is also a possibility that the treatment is not effective and death may occur within days or months. Patients with left kidney cyst need to pay attention to regular observation, and it is recommended to visit the nephrology department of regular hospital and review ultrasound every six months or so to understand the change of cyst size. If the cyst is more than 4cm in diameter, it can cause some damage to the kidney function, listen to the doctor’s opinion to see if it needs to receive surgery.