<unk>  is a noncancerous liver tumor made of dilated (widened) blood vessels. It is the most common primary liver tumor. The first case of spontaneous rupture of a<unk>  was described by Van Haefen in 1898.<unk>  may be classified into typical and atypical<unk> . Development of<unk>  is the result of genetic mutations, overexpression of angiogenic fators and downregulation of inhibitors of angiogenesis.<unk>  may be associated with Kasabach-Merritt syndrome, hereditary hemorrhagic telangiectasia,<unk>  arterio-portal shunts, extra<unk> ta, hemolytic anemia, focal nodular hyperplasia. On gross pathology, a well-circumscribed subcapsular tumor may be suggestive of<unk> .<unk>  must be differentiated from other diseases such as<unk>  abscess,<unk> ellular carcinoma,<unk>  cyst, and hemangioendothelioma. The prevalence of<unk>  is estimated to be up to 20% in general population.<unk>  commonly affects individuals between 30 to 50 years of age. If left untreated, patients with giant<unk> s may progress to develop complications. Complications of<unk>  include spontaneous rupture, acute hemorrhagic shock, and upper abdominal pain. Prognosis is generally excellent, and the mortality rate of patients with spontaneous rupture of<unk>  is approximately 30-40%. Symptoms of<unk>  include intermittent right upper quadrant abdominal pain, dyspepsia, early satiety, and vomiting. Common physical examination findings of<unk>  include palpable upper abdominal mass, hepatomegaly, and biliary colic. Some patients with<unk>  may have elevated concentration of transaminases, bilirubin, and alkaline phosphatase even in asymptomatic cases. On CT scan,<unk>  is characterized by dynamic enhancement pattern related to the size of its vascular space. Observation is recommended for patients with small<unk> s (less than 4 cm), whereas asymptomatic patients are followed up with periodic radiological examination. Elective surgical resection is recommended among all symptomatic patients with large<unk>  > 5 cm.
Hepatic hemangioma
Hepatic cysts
Cholangiocarcinoma
Hepatocellular adenoma
Splenic cyst
Splenic tumor
Hepatocellular carcinoma
Liver abscess