Abstract
A 46-year-old woman was diagnosed with a 15-cm cystic hepatic tumor in the medial and anterior segment of the liver in 1997, and cystic drainage and minocycline injection therapy had been performed repeatedly at another hospital. She was referred to our hospital for surgical treatment of abdominal distension in 2008. Abdominal computed tomography revealed an enlarged multilocular cystic lesion with calcification, and also revealed enhancement of a thickened wall on intravenous contrast agent administration. Hepatobiliary cystadenoma or cystadenocarcinoma was diagnosed, and central hepatic bisegmentectomy was performed. The resected specimen contained the multilocular cystic tumor, and this tumor was histopathologically diagnosed as a mucinous cystic neoplasm (MCN) of the liver with ovarian-like stroma without malignant components. Estrogen and progesterone receptors were identified by immunohistological examination. There is no evidence of tumor recurrence after surgery till 2015. Although MCN of the liver comprises a wide range of histopathologic atypia, complete resection provides favorable prognosis. MCN of the liver should be considered as a differential diagnosis for simple hepatic cysts, because some patients with MCN of the liver might be incorrectly treated for a simple hepatic cyst.
