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Open or endoscopic skull base surgery: how the route is chosen | CION Cancer Clinics
Neither approach is better for every tumour. Endoscopic skull base surgery works through the nostrils with a thin camera and leaves no cut on the face. Open surgery uses a cut on the scalp or face to give a wide, direct view. The team chooses by where the tumour reaches and what it will take to remove it completely. This page sets the two side by side. 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
- Is endoscopic or open skull base surgery better?
- How do the two approaches differ?
- What does the team weigh before choosing?
- How is the decision actually made?
- Who does each approach not suit?
- What do people get wrong about the two approaches?
- What should you ask the surgeon?
- Common questions about open and endoscopic approaches
The short answer
Is endoscopic or open skull base surgery better?
Neither is better in every case. The endoscopic route goes through the nose with a thin camera and leaves no cut on the face. The open route uses a cut on the scalp or face to give the surgeon a wide, direct view. The right one is the one that lets the team remove the whole tumour as safely as possible.
Why the tumour decides
Where the tumour sits matters most. Tumours along the middle of the skull base, behind the nose, can often be reached through the nostrils. Tumours that have spread to the sides, into the eye socket or into the skin of the face usually need an open approach, because the camera cannot safely reach every edge.
What the team is aiming for
The first goal in cancer surgery is removing the tumour with a rim of normal tissue around it. A smaller cut is welcome, but not if it means leaving cancer behind. That is why some operations start through the nose and add an open cut when the view shows it is needed.
Side by side
How do the two approaches differ?
Open approach
Endoscopic approach
A cut on the scalp behind the hairline, or on the face
No cut on the face; instruments pass through the nostrils
A wide direct view, useful when the tumour spreads sideways
A close, magnified view of the middle of the skull base
A window of bone is lifted out and fixed back
The skull floor is sealed from below, often with lining from the nose
Swelling of the face and a scar that settle over weeks
Crusting and a blocked nose that settle over weeks
Suits tumours in the eye socket, the skin or far to the side
Suits tumours that stay near the middle
Behind the choice
What does the team weigh before choosing?
Where the tumour reaches
The scans show which edges touch the eye socket, the brain lining, the main arteries or the nerves. Every edge must be reachable by the chosen route.
The type of cancer
Some cancers need a wide rim of normal tissue. Others respond well to radiotherapy, so the operation can be more limited. The biopsy report guides this.
Nerves and vessels in the way
The route that keeps the surgeon clear of the carotid artery, the main artery to the brain, and the nerves for sight is often the one chosen.
The repair afterwards
A large opening in the skull floor needs a strong seal. The team plans which tissue will do that before the operation begins.
The person, not only the tumour
Age, heart and lung health, and any earlier radiotherapy or surgery in the area all change what is safe.
Not sure whether this applies to you?
Ask an oncologistThe decision
How is the decision actually made?
Scans read together
A CT scan and an MRI are read side by side. One shows the bone, the other shows soft tissue and the lining of the brain.
Biopsy confirmed
The tissue type comes first. A lymphoma, for example, is usually treated without a major operation at all.
Tumour board
Head and neck, ENT and brain surgeons sit with radiation and medical oncologists and agree an approach together.
Explained to you
The surgeon tells you which route is planned, what the backup is if the view is not enough, and which risks come with it.
Being straight with you
Who does each approach not suit?
An endoscopic approach does not suit tumours that have grown into the skin of the face, deep into the eye socket or far out to the side of the skull base. Trying to remove those through the nose risks leaving tumour behind.
When an open approach is not the right fit
An open approach may be avoided when the tumour sits deep in the middle of the skull base, where reaching it from above would mean moving the brain more than is safe. It may also be harder on someone who would not cope well with a very long operation.
What this page cannot tell you
It cannot tell you which route suits your scans. Not every centre offers both routes, and a surgeon who does only one may lean towards it. Ask whether the case was discussed by a team that does both, and whether a combined operation was considered.
Commonly believed
What do people get wrong about the two approaches?
"Endoscopic means small surgery and a quick recovery."
The cut is smaller, but the work inside can be just as extensive. People still need close watching in the first days, and the nose can stay blocked and crusty for weeks while it heals.
"Open surgery is old-fashioned."
For tumours that spread sideways, into the eye socket or into the skin, an open approach is often what allows complete removal. It remains a standard part of skull base cancer surgery.
"If they have to open the head after starting through the nose, something went wrong."
Adding an open approach during surgery is a planned option. It happens when the view shows the tumour reaching further than the scans suggested.
"The route decides how things turn out."
What matters more is the type of cancer, how completely it can be removed and the treatment that follows. The route is only the way to get there.
Take this with you
What should you ask the surgeon?
- Which route is planned, and why this one for these scans
- Whether a combined or staged operation was considered
- What happens if the view through the nose is not enough
- Which nerves, and which senses, are at risk with this route
- Where any cut will be, and how the skull floor will be sealed
- Whether radiotherapy is likely afterwards
Questions we are asked
Common questions about open and endoscopic approaches
Does endoscopic skull base surgery leave a scar?
Usually there is no visible scar on the face, because everything passes through the nostrils. Sometimes a small cut is made on the thigh or tummy to take fat or tissue for the repair. The inside of the nose takes some weeks to heal, and crusting is common while it does.
Is recovery faster after the endoscopic route?
The hospital stay is often shorter and there is no scalp wound to heal, but it depends on how much was removed and how the repair holds. The nose needs care for some time. After an open approach, swelling of the face and eyes is common at first and settles gradually.
Can the cancer come back after either operation?
Any cancer can come back, whichever route was used. The chance depends on the type of cancer, whether it was fully removed and the treatment given afterwards. You will have regular scans in follow-up. Ask the team which signs to watch for between appointments.
Why did two surgeons suggest different approaches?
Surgeons read the same scans with different training and experience, and one who works mainly with one technique may prefer it. It is reasonable to ask each of them why, and whether a team that does both approaches has reviewed the case. That is a normal question, not a rude one.
Is the endoscopic route safer?
It avoids a scalp cut and lifting the brain. It carries its own risks, including a leak of brain fluid through the nose, bleeding and lasting nose problems. Each route has a different set of risks, and your surgeon should explain which of them apply to this tumour.
Will my mother lose her sense of smell?
It depends more on where the tumour is than on the route. Tumours in the roof of the nose sit on the smell nerves, and removing them usually means losing smell. Tumours further back may leave smell weaker for a while. Ask the surgeon directly whether smell is likely to be affected.
Can both approaches be used together?
Yes. A combined operation uses the nose and a scalp or face cut, at the same time or in two stages. It is chosen when a tumour reaches areas that neither route can manage safely on its own. Your surgeon will explain whether this is likely before you give consent.
Does the approach change the cost?
It can. Equipment, operating time, intensive care and the length of stay all vary. Aarogyasri, CGHS, ECHS, EHS and most cashless insurance policies cover cancer surgery, subject to their rules. Call the helpline with your card or policy details to check your cover for the planned operation.
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Dr. C. Raghavendra Reddy
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Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
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Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
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Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
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Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
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Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
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Sources
- National Cancer Institute — Paranasal Sinus and Nasal Cavity Cancer Treatment (PDQ) - Patient Version
- American Cancer Society — Nasal Cavity and Paranasal Sinus Cancer
- Cancer.Net — Nasal Cavity and Paranasal Sinus Cancer
- NHS — Nasal and sinus 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
Skull base surgery: what it involvesThe whole pathway, from scans to going homeEndoscopic endonasal surgery explainedA closer look at the route through the noseReconstruction of the skull baseHow the floor of the skull is sealed after either routeWhere skull base surgery should be doneWhat to look for in a team that offers both approachesChoosing a surgeon and a centreQuestions that help you compare what you have been told
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