A liver biopsy is a procedure that involves taking a small tissue sample from the liver. This sample is then examined under a microscope by a pathologist to diagnose suspected damage or disease in the liver. Physicians may recommend a liver biopsy when abnormalities are detected in liver function tests or imaging methods. Additionally, a biopsy may be performed to determine the stage or severity of a known liver disease. The results of the biopsy help in establishing an accurate diagnosis and shaping the treatment plan or re-adjusting existing treatment.