Medical Oncologist
CION Cancer Clinics
Transoral robotic surgery (TORS), explained | CION Cancer Clinics
Transoral robotic surgery, or TORS, removes a throat tumour through the open mouth using thin robotic arms and a camera that the surgeon controls from a console. It is used mainly for small tonsil and tongue-base cancers, and it is available at a limited number of large Indian centres. This page explains what happens, who it does not suit and what to ask. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
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Medically reviewed by Dr. Mohammed ImaduddinConsultant Surgical Oncologist · MBBS, MS (General Surgery), MCh (Surgical Oncology) · last reviewed September 2026, next review due September 2027
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On this page
- What is transoral robotic surgery, and who actually operates?
- Which cancers is TORS used for?
- What happens during a TORS operation?
- How does TORS differ from open surgery?
- Three things families say about robotic surgery
- Words you will meet on the operation note
- Is TORS available in India, and what should you ask?
- Common questions about transoral robotic surgery
The short answer
What is transoral robotic surgery, and who actually operates?
Transoral robotic surgery, or TORS, removes a throat tumour through the open mouth using thin robotic arms and a camera that the surgeon controls from a console in the same room. The surgeon operates. The robot is the instrument, and it makes no decision on its own.
Why a robot is used at all
The back of the tongue and the tonsil area sit around a bend that a straight instrument cannot see past. The robot's camera gives a magnified, three-dimensional view around that corner, and its wristed arms can cut and hold tissue at angles a human hand cannot reach through the mouth.
What the operation is trying to achieve
The same thing as any cancer operation: the tumour out in one piece, with a rim of healthy tissue, called a margin, around it. The lymph nodes in the neck are usually removed in the same sitting through a cut on the neck, because the robot cannot reach them from inside.
Where it is used
Which cancers is TORS used for?
It suits small tumours in places the arms can reach, with a mouth that opens wide enough to let them in.
Tonsil and base of tongue
The most common use. Many of these cancers are linked to the HPV virus, tend to be found in younger people, and are often small at the tumour itself even when a neck node is enlarged.
Upper voice box
Tumours on the flap above the vocal cords, and some on the walls of the throat beside the voice box, can be reached with the robot in selected cases.
Cancer on the vocal cords themselves is usually treated with laser microsurgery or radiotherapy instead.Finding a hidden tumour
When a neck node contains cancer but scans cannot show where it began, the robot is sometimes used to remove the tonsil and the lining of the tongue base so the laboratory can search for the source.
Where it does not suit
Large tumours, tumours growing into the jawbone, the deep tongue muscle or the big neck vessels, and tumours the surgeon cannot see in full. A stiff jaw, a small mouth opening or previous neck radiotherapy can also rule it out. Open surgery or chemoradiation is then the plan.
Not sure whether this applies to you?
Ask an oncologistOn the day
What happens during a TORS operation?
General anaesthetic
You are fully asleep throughout. The breathing tube is passed through the nose or mouth and fixed out of the surgeon's way. Some centres place a temporary breathing opening in the neck for larger tumours; ask beforehand whether that is planned.
The mouth is held open
A frame keeps the mouth open and the tongue pulled forward. The robot's camera and two working arms are then guided in through the mouth. The lips, tongue and teeth can feel bruised afterwards from this part alone.
The surgeon works from the console
Sitting a few feet away, the surgeon watches the magnified view and moves the arms. An assistant stands at your head, suctioning and helping. Edges of the removed tissue are often checked by the laboratory while you are still asleep.
The neck, then recovery
If neck nodes are being removed, that is done through a cut along a skin crease, before or after the mouth part. You wake with a sore throat, usually a drain in the neck, and sometimes a soft feeding tube through the nose for the first days.
Side by side
How does TORS differ from open surgery?
Robotic, through the mouth
Open, through the neck or jaw
No outer wound from the tumour removal itself
A neck cut, and sometimes the jawbone divided and plated
Usually a shorter hospital stay and quicker return to eating
Usually a longer stay, often with a temporary breathing opening
Suits small tumours the camera can see in full
Suits large or deep tumours, and tumours into bone
Main risk is bleeding inside the throat after going home
Main risks are wound healing, swallowing and the airway
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Commonly believed
Three things families say about robotic surgery
"A robot is more accurate than a human surgeon."
The robot copies the surgeon's hand movements. It does not know where the tumour ends. The result depends on the surgeon's judgement and experience with this exact operation, which is why it is fair to ask how many they do each year.
"Robotic means no radiotherapy afterwards."
For some people surgery alone is enough. For others the final report shows cancer close to an edge or in several neck nodes, and radiotherapy, sometimes with chemotherapy, is still advised. That cannot be promised either way before the report is back.
"It is a small procedure because there is no scar."
The wound is inside the throat and it is a real cancer operation. Swallowing takes time to return, the throat is sore for weeks, and bleeding after discharge is a genuine risk. The absence of an outer scar is a benefit, not a measure of size.
On your report
Words you will meet on the operation note
- Oropharynx
- The middle part of the throat: the tonsils, the back third of the tongue, the soft palate and the back wall. This is where TORS is mostly used.
- p16 positive
- A laboratory marker that the tumour is linked to the HPV virus. It changes how the cancer is staged and sometimes how much treatment is advised afterwards.
- Margin
- The rim of normal tissue around what was removed. Clear means no cancer at the edge. Close or involved may mean a further procedure or radiotherapy.
- Neck dissection
- Removal of the lymph nodes, the small glands that filter fluid from the throat, through a cut on the neck. Usually done in the same sitting.
- Extranodal extension
- Cancer that has grown through the outer wall of a lymph node. If the report says this, more treatment after surgery is usually discussed.
Being straight with you
Is TORS available in India, and what should you ask?
Yes, at a limited number of large centres in the metro cities, including Hyderabad. The machine is expensive, and the surgeon needs specific training and a steady volume of cases to stay skilled. Fewer centres offer it than offer laser or open surgery, and the robotic component usually adds to the bill.
Questions worth putting to any centre
Ask whether your tumour is suitable for TORS at all, and if not, why not. Ask how many transoral robotic operations the surgeon does in a year. Ask what happens if the margins are not clear. Ask whether the neck nodes will be removed in the same operation, and whether a temporary breathing opening is planned. Ask what the alternative is, usually chemoradiation, and what each would mean for your swallowing.
What this page cannot tell you
It cannot tell you whether TORS is right for you, or whether surgery or chemoradiation would serve you better. The choice rests on the exact tumour, your fitness for a long anaesthetic and how each option affects your swallowing in the long run. That is a tumour board discussion, not a web page.
Bring the biopsy report, every scan and your list of medicines, including blood thinners, to that appointment. Bring the family member who will be with you afterwards.Questions we are asked
Common questions about transoral robotic surgery
Is the robot operating on my mother, or the surgeon?
The surgeon, every second. The robot has no automatic function. It translates the surgeon's hand movements at the console into movements of the small arms inside the mouth, with the tremor removed and the view magnified. If the surgeon stops, the arms stop.
How long will she be in hospital?
Usually several days rather than overnight, because the team wants to see that she can swallow safely and that the bleeding risk has passed before discharge. If a temporary feeding tube or breathing opening was needed, the stay is longer. Your surgeon will give a likely range for her case.
Will she be able to eat and speak normally?
Most people return to normal speech and a normal diet, but the first weeks are slow. Soft food, small mouthfuls and a speech and swallowing therapist's guidance are usual. Removing part of the tongue base or soft palate can change the voice slightly or let fluid come back through the nose for a while.
What is the biggest risk?
Bleeding from the throat in the days after surgery, sometimes after going home. It is uncommon but serious, because blood can block the airway. Any fresh blood in the spit needs same-day contact with the team. Your surgeon may tie off a small artery in the neck during the operation to lower this risk.
Is TORS better than chemoradiation for tonsil cancer?
Neither is better for everyone. Both are standard for early disease. Surgery avoids radiotherapy for some people and gives a full laboratory report; chemoradiation avoids an operation. The choice depends on the tumour, the neck nodes and your general health. Ask your team to explain why they lean one way for you.
Does CION do robotic surgery?
What we can do straight away is read your reports and tell you whether TORS is worth asking about, what the alternatives are, and which questions to put to any centre offering it. Equipment and surgeon experience vary between hospitals. Call the helpline and a surgical oncologist will talk it through before you commit.
Is robotic surgery covered by Aarogyasri or insurance?
Cancer surgery is generally covered under Aarogyasri, CGHS, ECHS, EHS and most cashless insurance, but the robotic charge is sometimes treated differently from the operation itself. Get a written estimate under your own scheme from the hospital's insurance desk before admission, and ask what is excluded.
Will there be a scar?
Not from the mouth part. If the neck nodes are removed in the same sitting, there is a line along a skin crease in the neck, which fades over months. Ask beforehand whether a neck dissection is planned, so the scar is not a surprise on the day.
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Sources
- National Cancer Institute — Oropharyngeal Cancer Treatment (PDQ) - Patient Version
- American Cancer Society — Surgery for Oral Cavity and Oropharyngeal Cancer
- Cancer Research UK — Mouth and oropharyngeal cancer
- NICE — Cancer of the upper aerodigestive tract: assessment and management (NG36)
- Macmillan Cancer Support — Head and neck 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
Transoral Surgery: Operating Through the MouthThe approach in general, laser and robot togetherTORS for Oropharyngeal and HPV-Related CancerThe cancer TORS is most often used forAvailability and Cost of TORS in IndiaWhere it is offered and what it adds to the billBleeding After Transoral SurgeryThe one complication that cannot waitChoosing a Surgeon and a CentreThe questions that tell you about experience
Talk to us
Been told about robotic surgery for a throat cancer?
Send us the biopsy and scan reports or call the helpline. A surgical oncologist will tell you whether TORS is worth asking about, what the alternatives are, and what to ask any centre. One helpline serves every CION centre.