What Is a Liver Transplant and How Does It Work?

A liver transplant is surgery to remove a diseased or failing liver and replace it with a healthy one from a donor. It’s the only cure for liver failure, and outcomes are strong: about 93% of recipients survive at least one year, and roughly 80% are still alive five years later.

What Your Liver Does

The liver is your largest internal organ, and it handles an enormous range of jobs. It processes nutrients, medications, and hormones. It produces bile, which helps your body absorb fats, cholesterol, and fat-soluble vitamins. It makes proteins that allow your blood to clot, filters bacteria and toxins from your bloodstream, and helps fight infection. When the liver fails, these functions collapse in ways that affect nearly every system in your body, which is why transplantation becomes a life-saving measure rather than an elective one.

Common Reasons People Need a Transplant

Most liver transplants are performed because of chronic liver disease that has progressed to the point where the organ can no longer function. The leading causes include long-term damage from hepatitis B or C, alcohol-related liver disease, and nonalcoholic fatty liver disease (a condition increasingly common in people with obesity or metabolic syndrome). Some people need a transplant because of bile duct diseases like primary sclerosing cholangitis, inherited metabolic conditions, or liver cancers that haven’t spread beyond the organ.

Acute liver failure, where the liver shuts down suddenly over days or weeks, can also require an emergency transplant. This may result from a severe drug reaction, a viral infection, or other rapid-onset conditions.

How Candidates Are Prioritized

There are far more people waiting for a liver than there are available organs, so a scoring system determines who receives one first. In the United States, this is the MELD score (Model for End-Stage Liver Disease), which estimates how urgently a patient needs a transplant based on how sick their liver is. The higher the score, the more severe the liver failure and the higher the priority on the waiting list. Certain conditions that the MELD score doesn’t fully capture, like specific bile duct diseases or polycystic liver disease, can qualify for exception points that adjust a patient’s place on the list.

Getting listed for a transplant involves a thorough evaluation: blood tests, imaging, heart and lung assessments, psychological screening, and meetings with a transplant team. Not everyone with liver disease is a candidate. The team needs to confirm that transplantation is the best option and that the patient is healthy enough to survive the surgery and recovery.

Deceased vs. Living Donors

Most transplanted livers come from deceased donors, people who have died (often from brain injury or stroke) and whose families have authorized organ donation. The liver is carefully matched to the recipient based on blood type, body size, and medical urgency.

Living donor transplants are also possible because the liver has a remarkable ability to regenerate. A healthy person can donate a portion of their liver, and both the donated segment and the remaining portion grow back to near-normal size within weeks to months. Living donor transplants can significantly shorten wait times, which matters when a patient’s condition is deteriorating.

What Happens During Surgery

Liver transplant surgery is a major operation that can take up to 12 hours. The surgical team clamps the bile ducts and blood vessels connected to the diseased liver, removes it, then places the new liver (or liver segment) and reconnects it to the patient’s blood vessels and bile ducts. The complexity of reconnecting these structures is one reason the operation takes so long. Patients are under general anesthesia the entire time, and the procedure requires a large incision across the upper abdomen.

Recovery After Surgery

A typical hospital stay after a liver transplant is 7 to 14 days, though complications can extend that. The first few days are spent in an intensive care unit, where the medical team monitors the new liver’s function, watches for bleeding, and manages pain. Once stable, patients move to a regular hospital room and begin walking short distances as soon as they’re able.

After discharge, recovery continues at home for several months. Most people feel significantly better within the first few weeks as the new liver takes over, but full recovery, including the ability to return to work or resume normal physical activity, typically takes three to six months. Frequent follow-up appointments are the norm during this period, with blood draws to check liver function and medication levels.

Lifelong Medications

Your immune system treats a transplanted liver as foreign tissue and will try to attack it. To prevent this, transplant recipients take immune-suppressing medications for the rest of their lives. The specific combination and dosages change over time. In the early months, doses tend to be higher, then gradually taper as the body adjusts. These medications are effective at preventing rejection, but they come with trade-offs: a weakened immune system means you’re more susceptible to infections and certain cancers over the long term, and some of these drugs can affect the kidneys, raise blood pressure, or increase blood sugar levels.

Missing doses or stopping these medications can trigger rejection, so consistency is essential. Your transplant team will monitor your drug levels regularly and adjust as needed.

Signs of Rejection

Even with medication, rejection can still happen. The most common warning signs include:

  • Fever above 100°F
  • Jaundice (yellowing of the skin and eyes)
  • Dark-colored urine
  • Itching
  • Abdominal swelling or tenderness
  • Unusual fatigue or irritability
  • Persistent headache

Rejection doesn’t mean the transplant has failed. When caught early, it’s often reversible with adjustments to medication. This is one reason transplant teams schedule frequent blood tests in the months and years after surgery, to detect subtle signs of rejection before symptoms appear.

Long-Term Survival and Quality of Life

According to the Scientific Registry of Transplant Recipients, one-year survival after a deceased donor liver transplant is about 93%. At five years, roughly 80% of recipients are alive. At ten years, the figure is about 64%. These numbers have improved steadily over the past few decades as surgical techniques and post-transplant care have advanced.

Most transplant recipients report a dramatic improvement in quality of life. Many return to work, travel, exercise, and live without the debilitating symptoms of liver failure. The ongoing commitment to medications, regular lab work, and lifestyle adjustments (limiting alcohol, staying current on vaccinations, being cautious about infections) becomes routine for most people over time.