Liver<unk> s are typically hyperechoic on ultrasound though may occasionally be hypoechoic; ultrasound is not diagnostic. Computed tomography (CT), magnetic resonance imaging (MRI) or single-photon emission computed tomography (SPECT) using autologous labelled Red Blood Cells (RBC) with Tc-99m is diagnostic. Biopsy is avoided due to the risk of haemorrhage. Hepatic<unk> s can occur as part of a clinical syndrome, for example Klippel-Trenaunay-Weber syndrome, Osler–Weber–Rendu syndrome and Von Hippel-Lindau syndrome. Types * Typical hepatic<unk>  * Atypical hepatic<unk>  * Giant hepatic<unk>  * Flash filling hepatic<unk>  – can account for up to 16% of all hepatic<unk> s * Calcified hepatic<unk>  * Hyalinized hepatic<unk>  * Other unusual imaging patterns * Hepatic<unk>  with capsular retraction * Hepatic<unk>  with surrounding regional nodular hyperplasia * Hepatic<unk>  with fatty infiltration * Pedunculated hepatic<unk>  * Cystic hepatic<unk>  – rare * Fluid-fluid level containing hepatic<unk>  – rare Giant hepatic<unk>  This large, atypical<unk>  of the liver may present with abdominal pain or fullness due to hemorrhage, thrombosis or mass effect. It may also lead to left ventricular volume overload and heart failure due to the increase in cardiac output which it causes. Further complications are Kasabach-Merritt syndrome, a form of consumptive coagulopathy due to thrombocytopaenia, and rupture.
Cavernous liver hemangioma
Hepatoid tumor
Liver angiosarcoma
Pancreatoblastoma
Hepatoblastoma
Hepatocellular adenoma
Pancreatic serous cystadenoma
Cholangiocarcinoma