Liver Biopsy

A liver biopsy is a procedure in which a small sample of liver tissue is removed and examined under a microscope to help diagnose or monitor a liver condition.

The liver sits in the upper right side of the abdomen. During a biopsy, a thin needle is guided into the liver — most often through the skin on the right side of the body — and a tiny core of tissue is taken. A pathologist (a doctor who studies tissue and cells) then looks at the sample closely to check for damage, inflammation (swelling and irritation), scarring, or abnormal cells. This gives the specialist far more detail than blood tests or scans alone can provide.

Doctors recommend a liver biopsy when other tests — such as blood tests or imaging scans — suggest a liver problem but cannot give a definite answer on their own. It is used both to make a first diagnosis and to track how a known liver disease is progressing over time.

• Chronic hepatitis B or C (long-lasting viral liver infections) — to measure how much damage the virus has caused
• Non-alcoholic fatty liver disease (NAFLD) and non-alcoholic steatohepatitis (NASH) — a condition where excess fat in the liver leads to inflammation
• Autoimmune hepatitis — when the body's immune system mistakenly attacks the liver
• Cirrhosis (severe scarring of the liver) — to confirm the diagnosis and assess its severity
• Unexplained abnormal liver blood tests that persist after initial investigation
• Abnormal growths or masses found on a scan that need to be identified
• Monitoring the health of a transplanted liver
• Investigating certain metabolic liver conditions, such as Wilson's disease (a build-up of copper in the liver) or haemochromatosis (excess iron)

A liver biopsy is not always the right choice. Doctors will usually avoid it or proceed with extra caution in the following situations:

• Significant bleeding disorder (coagulopathy) or very low platelet count (platelets are the blood cells that help clotting)
• The patient is taking blood thinners and cannot safely stop them
• Severe ascites (a large build-up of fluid in the abdomen) that cannot be drained first
• A known blood vessel tumour (haemangioma) at the planned biopsy site
• The patient is unable to cooperate or hold their breath briefly during the procedure
• Infection of the skin or tissue at the entry site

Liver biopsy is a routine diagnostic procedure and is generally considered safe, but like any procedure that enters the body, it does carry some recognised risks.

• Pain or discomfort at the biopsy site — the most common experience, usually felt as a dull ache in the right shoulder or side for a few hours
• Bleeding inside the abdomen — the most serious complication; most cases are minor and settle on their own, but occasionally a blood transfusion or further treatment is needed
• Accidental puncture of a nearby organ, such as the gallbladder, lung, or bowel — rare but possible
• Bile leak (escape of digestive fluid from the bile ducts into the abdomen) — uncommon
• Infection at the needle entry site or inside the abdomen — uncommon
• A condition called pneumothorax (a collapsed lung) if the needle passes too close to the lung — rare
• Bruising under the liver surface (subcapsular haematoma) — usually resolves without treatment
• In very rare cases, a significant bleed may require surgery to control

Good preparation helps the procedure go smoothly and lowers the chance of complications. The medical team will give specific instructions, but the following gives a general idea of what to expect.

Before the procedure, patients are usually asked to stop eating and drinking for a set number of hours — commonly from midnight the night before, though the exact fasting period will be confirmed by the hospital. Any blood-thinning medications — including aspirin and non-steroidal anti-inflammatory drugs (NSAIDs, a type of common painkiller) — are usually paused for several days beforehand, because they can increase bleeding risk. Smoking and alcohol are best avoided in the days leading up to the procedure, as both can affect liver blood flow and healing. The doctor will advise on any other regular medications.

Several tests are typically carried out in the days or week before the biopsy to make sure it is safe to proceed:

• Blood clotting tests — to check that the blood will clot properly after the needle is withdrawn
• Full blood count — to measure platelet levels and check for anaemia (low red blood cell count)
• Liver function blood tests — a baseline reading of how the liver is working
• Ultrasound (USG) or CT scan of the liver — to map the liver's position, size, and to identify any blood vessels or structures to avoid
• Blood type and cross-match — so compatible blood is available if a transfusion is ever needed

On the day of the procedure, the steps typically follow this order:

• 1. The patient changes into a hospital gown and lies on an examination table, usually on their back with the right arm raised above the head.
• 2. Vital signs (blood pressure, heart rate, oxygen level) are checked and recorded.
• 3. An intravenous (IV) line is placed in the arm so that medications and fluids can be given quickly if needed.
• 4. The skin on the right side of the abdomen is cleaned with an antiseptic solution.
• 5. A local anaesthetic (numbing medicine injected under the skin) is given to reduce pain at the entry point.
• 6. In many hospitals, ultrasound guidance is used in real time so the doctor can watch the needle on a screen and steer it accurately.
• 7. The biopsy needle is inserted, a small tissue sample is taken — this takes only a few seconds — and the needle is removed.
• 8. A dressing is placed over the small puncture site.
• 9. The patient is moved to a recovery area and monitored closely for several hours.

After the biopsy, the medical team monitors the patient closely for several hours before allowing them to go home — or, in some cases, arranges an overnight stay. This monitoring period is important because most complications, especially bleeding, tend to appear within the first few hours. The care needed after returning home is straightforward, but following the guidance given reduces the chance of problems.

• Rest: Patients are usually advised to rest for the remainder of the day of the procedure and for at least one to two days afterwards; your medical team will confirm the recommended period.
• Lying position: Lying on the right side for the first hour or two after the procedure helps put gentle pressure on the biopsy site, which can reduce bleeding.
• Physical activity: Heavy lifting, strenuous exercise, and activities that strain the abdomen are usually avoided for about one week, or as directed by the doctor.
• Driving: Patients are not able to drive themselves home on the day of the procedure; a companion or organised transport is needed.
• Pain relief: Mild discomfort at the site is normal and is usually managed with simple painkillers as recommended by the doctor — blood-thinning painkillers such as aspirin or NSAIDs are typically avoided for a short period after the procedure.
• Wound care: The small dressing over the puncture site should be kept dry and clean; the team will advise when it can be removed.
• Blood-thinning medications: The doctor will decide when it is safe to restart any blood thinners that were paused.
• When to seek urgent care: Patients should contact a hospital immediately if they experience severe pain in the abdomen or shoulder, feel faint or dizzy, have a high fever, or notice any unusual bleeding.
• Follow-up appointment: The biopsy results usually take several days to a couple of weeks to come back from the laboratory; a follow-up visit with the specialist is arranged to discuss the findings and decide on any next steps in treatment or monitoring.