Undifferentiated carcinoma of liver and intrahepatic biliary tract is an extremely rare epithelial tumor of the liver and biliary tract which presents heterogenous histological findings and not yet fully defined clinicopathological characteristics. Patients usually present with nonspecific signs and symptoms, such as abdominal pain, nausea, vomiting, anorexia, weight loss and/or jaundice. Invasive growth, high metastatic potential and a rapid clinical course are typically associated. The disease is undifferentiated carcinoma of liver and intrahepatic biliary tract (MONDO_0018533). Also known as: undifferentiated carcinoma of liver and IBT.