We assess surgical treatment for seven patients with hepatic cyst on the basis of our clinical experience. It is emphasized to infer that surgical treatment is necessary for carcinoma arising from a cyst or suspcious one. It is also recommended that incidentally detected cysts should be treated with ethanol infusion under direct vision, if necessary, by using echoguided method. The operation method of deroofing except for complete resection is not necessarily guaranteed for large sized cysts
