A liver biopsy is a procedure in which a small sample of liver tissue is removed and examined under a microscope. It helps physicians diagnose, evaluate, and monitor a variety of liver conditions.
The tissue sample provides valuable information about the presence and severity of inflammation, fibrosis (scarring), fatty liver disease, infection, tumors, or other liver disorders that may not be fully diagnosed through blood tests or imaging alone.
A liver biopsy is commonly performed using a thin needle inserted through the skin into the liver. In some cases, the procedure is performed using imaging guidance such as ultrasound or CT to improve accuracy and safety.
Reasons for a liver biopsy
Your physician may recommend a liver biopsy for the following reasons:
- Evaluation of abnormal liver function tests
- Diagnosis of chronic liver diseases
- Assessment of fatty liver disease (MASLD/NASH)
- Evaluation of liver fibrosis or cirrhosis
- Investigation of unexplained liver enlargement
- Assessment of hepatitis B or hepatitis C
- Evaluation of autoimmune liver diseases
- Investigation of liver masses or tumors
- Assessment of inherited metabolic liver disorders
- Monitoring of liver disease progression
- Evaluation of liver transplant function
- Determining the cause of unexplained liver abnormalities
Reasons for a repeat liver biopsy
A repeat liver biopsy may be recommended to:
- Monitor progression of liver disease
- Assess response to treatment
- Evaluate changes in liver fibrosis
- Monitor chronic hepatitis
- Reassess previously identified abnormalities
- Evaluate transplanted liver tissue
Benefits of a liver biopsy
A liver biopsy provides detailed information that may not be available through blood tests or imaging alone. Benefits include:
- Accurate diagnosis of liver disease
- Determination of disease severity
- Assessment of liver scarring (fibrosis)
- Guidance for treatment decisions
- Monitoring of treatment effectiveness
- Identification of conditions requiring specialized therapy
- Evaluation of liver tumors or abnormal tissue
How to prepare
Please inform your healthcare team if you have bleeding disorders, heart disease, lung disease, kidney disease, diabetes, allergies to medications, or any other significant medical condition.
- Do not eat or drink anything for at least 6 to 8 hours before the procedure, unless otherwise instructed.
- Inform your physician of all medications you are taking.
- Follow instructions regarding blood thinners, antiplatelet medications, aspirin, and herbal supplements.
- Blood tests may be performed before the procedure to evaluate clotting function.
- Arrange for a responsible adult to drive you home if the procedure is performed on an outpatient basis.
What to expect during the procedure
- You will change into a hospital gown, and an intravenous (IV) line may be started.
- Your vital signs will be monitored throughout the procedure.
- You will typically lie on your back or slightly turned onto your side.
- The skin over the biopsy site will be cleaned with an antiseptic solution.
- A local anesthetic will be used to numb the area.
- Ultrasound guidance may be used to identify the safest location for the biopsy.
- The physician inserts a specialized biopsy needle through the skin and obtains a small tissue sample from the liver.
- You may be asked to briefly hold your breath during the biopsy.
- The procedure generally takes approximately 15 to 30 minutes.
After the procedure
- You will be monitored in a recovery area for several hours.
- Your blood pressure, heart rate, and overall condition will be closely observed.
- Mild soreness at the biopsy site, or discomfort in the right shoulder, may occur temporarily.
- Most patients can return home the same day after observation.
- The tissue sample is sent to a pathology laboratory; results are typically available within several days to two weeks.
Important instructions after the procedure
- Rest for the remainder of the day following the procedure.
- Avoid strenuous activity, heavy lifting, or vigorous exercise for several days as directed by your physician.
- Follow instructions regarding medications and wound care.
Contact your physician immediately if you experience
- Severe abdominal pain
- Increasing pain at the biopsy site
- Shortness of breath
- Fever or chills
- Dizziness or fainting
- Significant bleeding
- Persistent nausea or vomiting
Risks and possible complications
Liver biopsy is generally safe when performed by experienced professionals, and most patients experience no significant complications. Possible complications include:
- Pain at the biopsy site
- Right shoulder pain
- Bleeding
- Bruising
- Infection
- Injury to nearby organs
- Bile leakage
- Pneumothorax (collapsed lung, when biopsies are performed near the upper liver)
- Adverse reactions to medications
Although serious complications are uncommon, they may require hospitalization, blood transfusion, additional procedures, or surgery. The findings from your liver biopsy will help your physician develop an individualized treatment and monitoring plan.