[Cystic hepatic malignant tumors]

Non-parasitic hepatic cysts are common finding at abdominal sonography and in vast majority they are benign lesions. We report two cases of cystic liver neoplasms, namely the biliary cystadenocarcinoma and malignant hemangioendothelioma. In both cases, despite slow development of the tumour the presence of cyst considerably delayed diagnosis and hindered surgical treatment. We believe that more aggressive approach in "atypical" hepatic cysts could improve prognosis in such cases.