Hepatic adenomas typically occur in females of reproductive age who are taking oral contraceptives. These lesions often can be large and are often seen to be irregular but well vascularized on CT scan. A patient with ampullary cancer would most likely develop pancreatitis or biliary obstruction. Gallbladder cancer is most commonly seen in patients with longstanding gallstone disease. Hepatocellular carcinoma and cholangiocarcinoma would be unusual findings in a young person without chronic liver disease.