Liver cysts may potentially become malignant. Although liver cysts are mostly caused by congenital genetic factors and generally do not show obvious symptoms—often only discovered during ultrasonographic examinations—they do not usually require special treatment. However, it is possible for liver cysts to turn cancerous, thus they should be taken seriously. Regular follow-up ultrasound examinations are necessary to monitor changes in size. If a cyst shows a significant increase in size over a short period, it is crucial to pay attention and to consider surgical removal as early as possible to achieve better treatment outcomes. Additionally, attention should also be given to patients with large liver cysts; early surgical intervention might be necessary, as a larger size may cause pain in the liver area and lead to liver function abnormalities, among other issues. Therefore, these symptoms should be taken seriously.