Diagnosis By Mayo Clinic Staff Print Liver biopsyLiver biopsyA liver biopsy is a procedure to remove a small sample of liver tissue for laboratory testing. A liver biopsy is commonly performed by inserting a thin needle through your skin and into your liver. Diagnosing liver cancer Tests and procedures used to diagnose liver cancer include: Blood tests. Blood tests may reveal liver function abnormalities. Imaging tests. Your doctor may recommend imaging tests, such as an ultrasound, computerized tomography (CT) scan and magnetic resonance imaging (MRI). Removing a sample of liver tissue for testing. Your doctor may recommend removing a piece of liver tissue for laboratory testing in order to make a definitive diagnosis of liver cancer. During a liver biopsy, your doctor inserts a thin needle through your skin and into your liver to obtain a tissue sample. In the lab, doctors examine the tissue under a microscope to look for cancer cells. Liver biopsy carries a risk of bleeding, bruising and infection. Determining the extent of the liver cancerOnce liver cancer is diagnosed, your doctor will work to determine the extent (stage) of the cancer. Staging tests help determine the size and location of cancer and whether it has spread. Imaging tests used to stage liver cancer include CTs, MRIs and bone scans. There are different methods of staging liver cancer. One method uses Roman numerals I through IV, and another uses letters A through D. Your doctor uses your cancer's stage to determine your treatment options and your prognosis. Stage IV and stage D indicate the most advanced liver cancer with the worst prognosis. Request an Appointment at Mayo Clinic Diagnosis & treatmentTreatment March 24, 2016 Print Share on: FacebookTwitter References AskMayoExpert. Hepatocellular carcinoma. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2015. Feldman M, et al. Hepatic tumors and cysts. In: Sleisenger and Fordtran's Gastrointestinal and Liver Disease: Pathophysiology, Diagnosis, Management. 10th ed. Philadelphia, Pa.: Saunders Elsevier; 2016. http://www.clinicalkey.com. Accessed Feb. 11, 2016. Bruix J, et al. Liver cancer: Approaching a personalized care. Journal of Hepatology. 2015;62:S144. Adult primary liver cancer treatment (PDQ). National Cancer Institute. http://www.cancer.gov/types/liver/patient/adult-liver-treatment-pdq. Accessed Feb. 11, 2016. Hepatobiliary cancers. Fort Washington, Pa.: National Comprehensive Cancer Network. http://www.nccn.org/professionals/physician_gls/f_guidelines.asp. Accessed Feb. 11, 2016. Management of hepatocellular carcinoma: An update. Alexandria, Va.: American Association for the Study of Liver Diseases. http://www.aasld.org/publications/practice-guidelines-0. Accessed Feb. 17, 2016. Hepatitis B FAQs for the public. Centers for Disease Control and Prevention. http://www.cdc.gov/hepatitis/hbv/bfaq.htm. Accessed Feb. 17, 2016. Hepatitis C FAQs for the public. Centers for Disease Control and Prevention. http://www.cdc.gov/hepatitis/hcv/cfaq.htm. Accessed Feb. 17, 2016. Cirrhosis. National Institute of Diabetes and Digestive and Kidney Diseases. http://www.niddk.nih.gov/health-information/health-topics/liver-disease/cirrhosis/Pages/facts.aspx. Accessed Feb. 17, 2016. Palliative care. Fort Washington, Pa.: National Comprehensive Cancer Network. http://www.nccn.org/professionals/physician_gls/f_guidelines.asp. Accessed Feb. 17, 2016. Adult cancer pain. Fort Washington, Pa.: National Comprehensive Cancer Network. http://www.nccn.org/professionals/physician_gls/f_guidelines.asp. Accessed Feb. 17, 2016. Cook AJ. Allscripts EPSi. Mayo Clinic, Rochester, Minn. Feb. 15, 2016. 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