Medical Oncologist
CION Cancer Clinics
Major vs minor hepatectomy: what the difference actually means | CION Cancer Clinics
A major liver resection removes three or more of the liver's eight segments. A minor resection removes fewer, often just the piece around the tumour. The label describes how much liver comes out and how much stays behind, not how serious the cancer is. This page explains what pushes the team towards one or the other, and what to ask before you agree to either. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
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Medically reviewed by Dr. Muralidhar MuddusettyConsultant Surgical Oncologist · MBBS (AIIMS), MS (Surgery, AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh) · last reviewed September 2026, next review due September 2027
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On this page
- What is the difference between a major and a minor liver resection?
- Major and minor liver resection, compared
- What decides whether you need a major or a minor operation?
- How does the team arrive at the size of the operation?
- Things families tell us about liver operations, and what is true
- Words you will see on the surgical plan, in plain language
- What can this page not tell you, and what should you ask instead?
- Common questions about major and minor liver resection
The short answer
What is the difference between a major and a minor liver resection?
A major liver resection removes three or more of the liver's eight segments. A minor resection removes fewer than three, often only the part of one segment that holds the tumour. Both are called a hepatectomy, which simply means removing part of the liver.
Why surgeons count in segments
The liver is built from eight segments, each with its own blood supply and bile drainage. A surgeon can take out one segment, or several next to each other, and leave the rest working. Taking half the liver means taking four segments. Taking half plus one more segment from the other side is called an extended resection.
Why the label matters to you
The label tells you how much liver will be left to do the work, and roughly how hard the recovery will be. A minor resection is usually a shorter operation with a quicker return to eating and walking. A major resection asks more of the liver that remains, so it is planned more carefully.
Major does not mean the cancer is worse. It describes where the tumour sits and what must come out with it, not how it will behave.Side by side
Major and minor liver resection, compared
Minor resection
Major resection
Fewer than three segments, or a wedge from the edge
Three or more segments, up to an extended right or left resection
Most of the liver stays behind
The remaining liver may be a third or less of the original
Often possible by keyhole surgery
Often an open operation, though keyhole is possible in selected cases
Usually a shorter hospital stay and a lighter recovery
A longer stay, closer blood monitoring and a slower return to normal
Liver function tests matter, but there is room for error
Liver function and remaining volume are measured before the team agrees to operate
What the team weighs
What decides whether you need a major or a minor operation?
The tumour decides most of it. Your liver decides the rest.
Where the tumour sits
A tumour near the edge can often be cut out with a small rim of healthy tissue. A tumour deep inside, or wrapped around a main vessel, can only come out with the whole section that vessel feeds.
How many tumours there are
Several small tumours through one half of the liver usually mean that half is removed as one piece. Tumours in both halves may need a different plan, sometimes surgery in two stages.
Often seen with
- Bowel cancer that has spread to the liver
- Some liver cancers found late
How healthy the rest of the liver is
A scarred liver, from hepatitis, alcohol or fatty liver disease, copes badly with a large resection. The team will then choose the smallest operation that clears the tumour, or something other than surgery.
How much liver would be left
Before a major resection the scan is used to measure the liver that would remain. If it is too small, the team may first block a vein to make the good side grow, and operate weeks later.
This is called the future liver remnant. It has its own page in this guide.Not sure whether this applies to you?
Ask an oncologistBefore the operation
How does the team arrive at the size of the operation?
Scans that map the liver
A contrast CT or MRI shows each tumour against the blood vessels and bile ducts. This is the picture the surgeon plans from, and it is why you may be asked for a fresh scan even if you have a recent one.
Blood tests for liver function
Bilirubin, albumin and clotting tests show how well the liver is working now. A liver that is already struggling narrows the options, whatever the scan shows.
Measuring the remnant
For anything approaching a major resection, the scan is used to calculate how much liver would stay. That number, set against your liver's health, is what settles whether the larger operation is possible.
Tumour board and the plan
Surgeons, oncologists and radiologists review the case together. You are then told which operation is being proposed, why, and what the alternatives were. Bring the family member who will help you decide.
Commonly believed
Things families tell us about liver operations, and what is true
"A smaller operation is always the safer choice."
Safer for the liver, yes. But if the tumour is not fully removed with a clear rim of healthy tissue, the operation has not done its job. The smallest operation that clears the tumour is sometimes a major one.
"They are removing half his liver, so he will never be normal again."
The liver is the one organ that grows back. After a major resection the remaining liver enlarges over the following weeks and months until it can do the full job. Most people return to normal eating and activity, at their own pace.
"If the surgeon says major, it means the cancer has spread."
It means the tumour sits somewhere that needs a large piece removed, or that there is more than one. Spread to other organs is a separate question answered by staging scans.
"Keyhole means minor and open means major."
The size of the cut and the amount of liver removed are different things. Some major resections are done through small cuts at centres with that experience, and some minor ones are done open because of where the tumour lies.
On your report
Words you will see on the surgical plan, in plain language
- Hepatectomy
- Removal of part of the liver. Partial hepatectomy and liver resection mean the same thing.
- Segment
- One of the eight working units of the liver. Surgeons number them, so a report may say "segments six and seven".
- Right or left hepatectomy
- Removal of the right or the left half of the liver. Also written as hemihepatectomy. The right half is the larger.
- Extended hepatectomy
- Half the liver plus one or more segments from the other side. Also called a trisectionectomy.
- Wedge resection
- A small piece taken from the edge of the liver around a tumour, without following segment boundaries. Always a minor resection.
- Parenchyma-sparing
- A plan that removes as little healthy liver as possible while still clearing every tumour. Used when tumours are spread across both sides.
Being straight with you
What can this page not tell you, and what should you ask instead?
This page cannot tell you which operation you or your parent needs. That depends on the scan, the blood tests and the health of the liver itself, and only the treating team has all three. Nor does the size of the operation forecast how the cancer will behave.
Questions worth asking your surgeon
Ask how many segments will come out and how much liver will remain. Ask whether the remnant has been measured, and whether anything is planned to make it grow first. Ask whether small cuts are possible at that centre, and what would make them switch to open on the day.
Who a major resection does not suit
People whose liver is already badly scarred, whose remaining volume would be too small, or whose fitness could not carry a long operation are usually offered something else. That may be a smaller resection, treatment that destroys the tumour with heat, or medicines. Being told this early is the team choosing the option your body can actually handle.
If you have two different opinions, bring both sets of reports to one appointment and ask the team to explain the difference.Questions we are asked
Common questions about major and minor liver resection
How much of the liver can be removed safely?
In a healthy liver, a large share can be removed as long as enough working tissue remains with its blood supply and bile drainage intact. In a scarred liver, far less can be taken. The figure for you comes from your scan and liver function tests.
Is a major hepatectomy a dangerous operation?
It is a big operation with real risks, mainly bleeding, bile leakage and the remaining liver struggling in the first days. Those risks are why planning is so thorough. Ask your surgeon how often the team performs this operation.
Will he need to stay in the ICU?
After a major resection, usually yes, for the first night or two, so that blood tests and drain output can be watched closely. After a minor resection some people go straight to the ward. An ICU stay is part of the plan, not a sign that something has gone wrong.
Does a minor resection mean the cancer was caught early?
Not necessarily. It means the tumour sat somewhere that could be removed without taking a large piece of liver. Stage is worked out separately from the pathology report and the staging scans, and the two do not always line up.
Can a major resection be done by keyhole surgery?
In selected cases, at centres with that experience, yes. It depends on where the tumour sits, how close it is to major vessels and the surgeon's training. Not every centre offers it, and an open operation is still the usual route for the largest resections. Ask what your centre would recommend and why.
What if the liver left behind is too small?
The team may block the portal vein on the side to be removed, which pushes the other side to grow over the following weeks. The operation is done once the scan shows enough volume. In some cases the resection is split into two operations. Both are explained on their own pages in this guide.
Will the liver really grow back after a major resection?
Yes. The remaining liver enlarges over the following weeks and months until it can do the full job. The segments removed do not return, but the tissue left behind expands to fill the gap. A scarred liver grows back more slowly.
Does a major resection cost more than a minor one?
Usually, because the operation and the hospital stay are both longer. Aarogyasri, CGHS, ECHS and EHS are accepted at CION, and most cashless insurers are empanelled, so the out-of-pocket figure is often very different from the sticker price. Call the helpline with your scheme details for an estimate.
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MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
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Dr. Vinay Mamidala
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Dr. Vajja Sandeep Kumar
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Sources
- Cancer Research UK — Surgery for liver cancer
- National Cancer Institute — Adult Primary Liver Cancer Treatment (PDQ)
- American Cancer Society — Surgery for liver cancer
- Macmillan Cancer Support — Liver cancer
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
How Much Liver Can Be Safely Removed?The limits behind the major and minor labelsFuture Liver Remnant ExplainedThe measurement that settles whether a major resection is possibleLaparoscopic and Robotic Liver ResectionWhen a smaller cut is possible and when it is notSegmentectomy and Wedge Resection of the LiverThe minor operations, in more detailDeciding on Cancer SurgeryHow to weigh an operation against the other options
Talk to us
Been told you need a liver resection?
Send us the scan report and the surgical plan, or call the helpline. A surgical oncologist will explain what is being proposed and what the alternatives are. One helpline serves every CION centre.