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What happens during a mandibulectomy | CION Cancer Clinics
A mandibulectomy removes the part of the lower jaw that a mouth cancer has reached, along with a rim of healthy tissue around it. It is done under general anaesthetic and is often combined with removing lymph nodes from the neck and rebuilding the jaw in the same operation. This page explains each part, the days in hospital, and the questions worth asking before you sign the consent form. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
On this page
- What actually happens in a mandibulectomy?
- What are the separate parts of the operation?
- What happens from the tests to going home?
- What do the words on your consent form mean?
- Who is this operation not suitable for?
- What do families often believe about jaw surgery?
- What should you ask your surgeon before the operation?
- Common questions about mandibulectomy
The short answer
What actually happens in a mandibulectomy?
In a mandibulectomy, the surgeon removes the section of your lower jaw that a mouth cancer has grown into or is pressing against, together with the tumour and a rim of normal tissue. In most cases the gap is rebuilt in the same operation, so you wake up with a jaw that has been repaired, not simply cut away.
Why the bone is taken at all
Cancers of the gum, floor of the mouth and inner cheek can sit right against the jawbone. If cancer has reached the bone, or no clear edge can be taken without it, leaving the bone would leave cancer behind. Removing it gives a clear margin: an edge of healthy tissue with no cancer cells in it.
How much bone is removed
Sometimes only a thin rim of the upper edge is shaved away and the jaw stays in one piece. Sometimes a whole section is removed, and the jaw is bridged with bone from the leg or a metal plate. Your surgeon plans this from your scans and confirms it in theatre.
The exact plan is only settled after your scans and biopsy have been reviewed. A page like this cannot tell you which operation you will need.One anaesthetic, several steps
What are the separate parts of the operation?
A mandibulectomy is rarely a single step. Most people have several of these done together while fully asleep.
Removing the tumour and bone
The surgeon works through the mouth, a cut in the neck, or sometimes a cut through the lower lip. The removed piece goes to the laboratory so its edges can be checked.
Neck dissection
Lymph nodes are small glands in the neck that filter fluid from the mouth. Mouth cancer often spreads to them first, so many operations remove them through a cut along a skin crease.
It helps the team decide
- How far the cancer had spread
- Whether radiotherapy is needed afterwards
Tracheostomy
Swelling after surgery can narrow the airway. A small breathing tube is often placed through the front of the neck until it settles. It is usually temporary, and the opening closes once it comes out.
Reconstruction
If a full section of jaw is removed, the gap is usually rebuilt. The commonest choice is a piece of the calf bone, the fibula, moved with its own blood vessels. Other options are bone from the hip or shoulder blade, or a titanium plate covered with soft tissue.
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Ask an oncologistBefore, during and after
What happens from the tests to going home?
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Tests and a dental check
Scans of the jaw and neck, blood tests, and a heart and lung check. A dentist may remove badly decayed teeth, because infection slows healing.
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The consent conversation
The surgeon explains how much jaw may be removed, how it will be rebuilt, and what could change once the operation starts. Bring the family member who will help you decide.
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The operation
It is long, and often takes most of the day when the jaw is rebuilt. You are fully asleep throughout. Two surgical teams may work at once, one at the jaw and one at the leg.
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Intensive care
Most people spend the first night or longer in intensive care. Nurses check the rebuilt jaw's colour and blood flow very often, because a problem caught early can often be put right.
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The ward
Swelling settles, the breathing tube comes out, and you are fed through a thin tube in the nose until the swallowing therapist confirms that sips and soft food are safe.
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Going home
Usually once breathing, feeding and walking are safe. Review visits check the wounds, and the final laboratory report decides whether radiotherapy is advised.
On the consent form
What do the words on your consent form mean?
- Marginal mandibulectomy
- Only the upper rim of the jaw is removed. The lower border stays, so the jaw remains one continuous bone.
- Segmental mandibulectomy
- A full-thickness section of jaw is removed, top to bottom. The jaw is no longer continuous and usually needs rebuilding.
- Margin
- The rim of normal tissue around what was removed. A clear margin means no cancer cells were found at the edge.
- Free flap
- Tissue moved from another part of your body with its own artery and vein, which are joined to vessels in your neck.
- Neck dissection
- Removal of lymph nodes from one or both sides of the neck, so they can be checked for spread.
- Ryle's tube
- The thin feeding tube passed through the nose into the stomach, used while the mouth heals.
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Being straight with you
Who is this operation not suitable for?
A mandibulectomy is a major operation, and it is not the right plan for everyone with a mouth cancer near the jaw. The decision belongs to you and your treating team together. It is usually shaped at a tumour board, where surgeons, radiation oncologists and medical oncologists look at your case in the same room.
What the team weighs
They look at how far the cancer has spread, whether clear margins are possible, and whether you would still be able to breathe, swallow and speak. Serious heart or lung disease, poorly controlled diabetes and heavy tobacco use all raise the risks of a long anaesthetic and of poor healing.
When other treatment may be discussed
If the cancer has spread widely, or if the operation carries more risk than benefit for you, the team may talk about radiotherapy, chemotherapy or care focused on comfort instead. None of these is a lesser choice. Ask why one plan was chosen over another, and what would change the recommendation.
Stopping tobacco, gutka and alcohol before surgery helps wounds heal. Ask your team for support with this. You do not have to do it alone.Commonly believed
What do families often believe about jaw surgery?
When the jaw is rebuilt in the same operation, the shape of the lower face is usually held reasonably well. Early swelling makes it look worse than it will. Some change is common.
Many people return to soft food and, over time, to a wider diet. How far eating recovers depends on how much jaw and tongue were removed, whether teeth can be replaced and whether radiotherapy follows. A swallowing therapist works on this with you.
Surgery does not make a cancer spread. Delaying it while the cancer grows into the bone can make the operation larger. If this fear is holding you back, ask the surgeon directly.
The tube in the neck is usually temporary. Many people speak with a cap or valve on it before it is removed, and the hole closes as it heals. Speech often sounds different afterwards, and a speech therapist helps with that.
Before you sign
What should you ask your surgeon before the operation?
- How much of the jaw do you expect to remove, and could that change in theatre?
- How will the jaw be rebuilt, and where will the tissue come from?
- Will lymph nodes be removed from one side of the neck or both?
- Will I need a breathing tube in my neck?
- How will I be fed while my mouth heals?
- Is radiotherapy likely afterwards, and what decides that?
- Who do we call once I am home?
Questions we are asked
Common questions about mandibulectomy
How long does a mandibulectomy take?
It is a long operation. When the jaw is rebuilt with bone from the leg, it often takes most of the day, because the cancer, the neck glands and the reconstruction are all done under one anaesthetic. Ask your surgeon for the likely length in your case.
Will I be in a lot of pain afterwards?
You will have pain, and it is managed. Pain medicines are given through a drip at first, and later through the feeding tube. The neck and leg wounds often hurt more than people expect, while the mouth can feel numb. Tell the nurses early rather than waiting until it becomes hard to bear.
How long will I stay in hospital?
It depends on the size of the operation and how quickly you recover. Most people go home once they are breathing safely without the neck tube, are fed well, and can walk with support. People who had bone taken from the leg usually stay longer.
Will I be able to talk to my family after surgery?
Not straight away. With a breathing tube in the neck and a swollen mouth, speaking is hard in the first days. Most people write notes, type on a phone or point at a letter board. Speech usually returns as the swelling settles and the tube is capped, often with help from a speech therapist.
Will my teeth be removed?
Teeth in the part of the jaw being removed come out with it. A dentist may also advise taking out other badly damaged teeth before surgery, especially if radiotherapy is likely, because decay near treated bone heals poorly. Replacing teeth later is sometimes possible, and your surgeon can explain the options.
Is the whole lower jaw taken out?
Very rarely. Most mandibulectomies remove only the section the cancer involves. That may be a thin rim from the top of the bone or a full section from one part of the jaw. The rest stays in place and is joined to the rebuilt part.
Will I need radiotherapy after the operation?
Sometimes. The decision is made once the final laboratory report comes back, showing whether the margins were clear and whether lymph nodes contained cancer. The tumour board reviews that report and advises whether radiotherapy, sometimes with chemotherapy, would lower the chance of the cancer coming back.
Is mandibulectomy covered by Aarogyasri or insurance?
Cancer surgery is often covered when it is part of an approved treatment plan. Aarogyasri, CGHS, ECHS and EHS are accepted, and most cashless insurers are empanelled. Cover for reconstruction and intensive care varies between schemes, so call the helpline with your card details before admission.
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MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
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MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
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Sources
- NHS — Mouth cancer: treatment
- Cancer Research UK — Surgery for mouth cancer
- American Cancer Society — Surgery for oral cavity and oropharyngeal cancers
- National Cancer Institute — Lip and oral cavity cancer treatment (PDQ), patient version
- Cancer.Net — Oral and oropharyngeal 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.
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