Liver cysts may be found in up to 5% of the population however most liver cysts do not cause symptoms. They are more often found in females and are the most common benign (non cancerous) lesion in the liver. Liver cysts may also be caused by a variety of infections such as Hydatid disease. In general, a simple liver cyst that is not causing symptoms is left alone. Cysts may be removed however if they are causing symptoms or if it is not clear they are benign (non cancerous). The diagnosis of a liver cyst is normally via a combination of the history, blood tests and specialised imaging tests such as a CT or MRI. Liver cysts may be removed via the laparoscopic (key hole) or open technique.