Patients with cirrhosis are at higher risk for a form of cancer called hepatocellular carcinoma (HCC) than persons who have normal liver function. Because treatments for HCC are more effective when the cancer is detected early, patients with cirrhosis should have yearly testing to help detect HCC. Screening can be done with a blood test or ultrasonography. Patients infected with hepatitis C virus (HCV) often develop cirrhosis, but it is not known whether screening for HCC in these patients is being done as it should be.