Liver cysts at the age of 70 may be congenital or caused by acquired parasitic infections, trauma, inflammation, tumors and so on. 1. Congenital hepatic cysts: the most common, the etiology is not known, most scholars believe that the cysts originate from the intrahepatic vagus bile ducts, it is the embryonic intrahepatic vagus bile ducts and lymphatic ducts due to inflammation hyperplasia or obstruction, which leads to retention of the contents of the lumen, developmental disorders and the formation of cysts. Congenital hepatic cysts without any symptoms can be left untreated and can be followed up by observation. 2. Acquired liver cysts: parasitic infections such as Echinococcus granulosus can lead to the formation of liver cysts; cysts can also be formed when the liver is hit by traumas and other traumatic injuries, and inflammatory stimuli, tumors and other factors can cause liver cysts to occur. In addition, inflammatory stimuli, tumors and other factors can cause liver cysts to occur. This can be done by treating the primary disease and removing the triggers for liver cyst formation. Patients with liver cysts at the age of 70 should go to the hospital in a timely manner to clarify the relevant causes of the disease, and then carry out the correct treatment and therapy according to the causes of the disease.