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., patients usually do not have a life-threatening condition and can survive for a long time. If it is a multiple kidney cyst with large cysts and symptoms such as bleeding and infection, it may progress to kidney failure, which will endanger the patient’s life and needs to be treated in time through puncture, drainage and surgical excision, etc. If treated properly, the disease can be relieved, but there is also a possibility that the treatment will be ineffective and the condition will worsen. 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 larger in diameter, it can cause some damage to the kidney function, and it is important to listen to the doctor’s opinion to see if it needs to receive surgery.