text: <unk><unk>  is an uncommon unilocular or multilocular cystic neoplasm that usually arises in the liver or occasionally in the extrahepatic<unk>  tree and gallbladder.<unk><unk> s constitute less than 5% of cystic lesions of the liver. On gross pathology,<unk><unk>  is unilocular or multilocular cystic lesion filled with fluid or blood. Cystic fluid may be clear and mucinous. On microscopic histopathological analysis, presence of<unk> -type epithelium wall supported by ovarian-like stroma is characteristic finding of<unk><unk> . The cause of<unk><unk>  has not been identified. However, it is thought to occur either as a result of the development of ectopic foci of primitive foregut sequestered within the liver or due to the obstruction of the congenitally aberrant bile duct. Neoplastic transformation to<unk> rcinoma is the most common complication of<unk><unk> .<unk><unk>  with mesenchymal stroma is associated with most favorable prognosis. Symptoms of<unk><unk>  include abdominal pain in right upper quadrant, abdominal distension, abdominal mass, nausea, and vomiting. Common physical examination findings of<unk><unk>  are a palpable, tender mass in the right upper quadrant of abdomen or epigastrium, jaundice, and ascites. On ultrasound,<unk><unk>  is characterized by fluid filled multiloculated cyst with enhanced transmission. The cyst fluid may contain low level echoes from blood products, mucin, or proteinaceous fluid. Contrast-enhanced ultrasound demonstrates minimal enhancement since the tumors are largely avascular. Surgical resection of tumor is the mainstay of treatment for<unk><unk> . Complete enucleation of the cyst is a safe and effective treatment for<unk><unk>  and hepatic resection is a suitable treatment option for<unk> <unk> rcinoma.
option_0: Biliary cystadenoma and cystadenocarcinoma
option_1: Fibrolamellar hepatocellular carcinoma
option_2: Hepatocellular carcinoma stagin
option_3: Mucinous cystadenocarcinoma x ray
option_4: Pyogenic liver abscess epidemiology and demographics
option_5: Pseudomyxoma peritonei epidemiology and demographics
option_6: Cholangiocarcinoma other imaging findings
option_7: Cholangiocarcinoma