How Is a Brain Tumor Removed? Surgery Types, Steps and Recovery
Few words are as frightening to hear as “brain tumour.” And almost every patient and family, once the shock settles, asks the same practical question: how is a brain tumour actually removed? The idea of an operation on the brain sounds overwhelming, and it is natural to imagine the worst. The reality of modern neurosurgery, however, is far more precise, controlled and reassuring than most people expect.
Today, brain tumours are removed using a range of carefully chosen techniques — from traditional open surgery (craniotomy) to keyhole endoscopic approaches, through-the-nose surgery, and even “awake” operations where you talk to the surgeon while the tumour is being taken out. Which method is used depends entirely on where the tumour sits, how big it is, and what type it appears to be.
In this article, written from the perspective of a practising neurosurgeon, we will walk through the main ways a brain tumour is removed, what happens before, during and after the operation, and what recovery usually looks like. The aim is not to alarm you, but to replace fear with understanding, so that you can ask better questions and make confident decisions with your surgical team. Please treat this as general education, not a substitute for a personal consultation.
What “removing a brain tumour” really means
The single most important concept in brain tumour surgery is a principle surgeons call maximal safe resection. In plain language, this means removing as much of the tumour as possible without harming the parts of the brain that control movement, speech, vision, memory and personality. Safety always comes before completeness.
Sometimes a tumour is well-defined, sits in a “quiet” part of the brain, and can be removed completely. At other times, a tumour has fingers that weave into vital tissue or wraps around important blood vessels. In those cases, a good surgeon may deliberately leave a very thin rim of tumour behind and treat it afterwards with radiation, radiosurgery or medicines, rather than risk causing a permanent disability. Removing 100% of a tumour is worthless if it leaves a person unable to speak or walk.
Surgery usually serves one or more goals at the same time: to obtain tissue for an exact diagnosis (biopsy), to relieve pressure inside the skull, to reduce the tumour’s bulk so other treatments work better, and to improve or protect neurological function. Understanding this “why” helps the whole plan make sense.
Before the operation: imaging, planning and preparation
A great deal of the work in brain tumour surgery happens before the first cut is made. Careful planning is what allows the operation itself to be smooth and precise. Your team will typically arrange several of the following steps:
- Detailed imaging (MRI, often with contrast): A high-resolution MRI maps the tumour’s exact size, shape and borders, and shows how close it lies to critical structures. Special sequences can even trace the brain’s wiring (tractography) and highlight areas of speech or movement (functional MRI).
- CT scan and angiography when needed: A CT shows bone detail, while imaging of the blood vessels helps the surgeon understand the tumour’s blood supply and avoid surprises.
- Anaesthetic and medical check-up: Blood tests, heart and lung assessment, and a review of your medicines ensure you are fit for anaesthesia. Blood thinners are usually paused in advance.
- Medicines to settle the brain: Steroids are often given to reduce swelling around the tumour, and anti-seizure medicine may be started to lower the risk of fits.
- Surgical planning and navigation upload: Your scans are loaded into a computer navigation system, effectively giving the surgeon a GPS map of your brain to plan the safest route to the tumour.
- Consent and honest counselling: This is the time to discuss the specific benefits, risks and alternatives, and to have your questions answered. A calm, informed patient recovers better.
Craniotomy: the main open operation to remove a brain tumour
The most common way to remove a brain tumour is an operation called a craniotomy. The word simply means temporarily opening the skull. Despite how dramatic it sounds, it is a highly refined, routine procedure in experienced hands.
After you are asleep under general anaesthesia, only a small strip of hair around the planned incision is usually shaved — not the whole head. The surgeon makes a cut in the scalp, then removes a small window of bone called a bone flap to reach the covering of the brain. Working under a powerful operating microscope, and guided by computer navigation, the surgeon gently separates the tumour from healthy brain and removes it piece by piece.
Think of it like carefully lifting a weed out of a flowerbed without disturbing the flowers around it. Tools such as an ultrasonic aspirator (which breaks up and suctions tumour tissue), fine bipolar forceps to control bleeding, and sometimes fluorescent dyes that make tumour cells glow, all help the surgeon see and remove the tumour precisely. Once removal is complete, the bone flap is fixed back in place with tiny plates or screws, and the scalp is closed. Over time the incision heals and is largely hidden by hair.
Minimally invasive surgery: endoscopic and through-the-nose approaches
Not every tumour requires a traditional open craniotomy. For certain locations, surgeons use smaller, less disruptive routes that can mean faster recovery and no visible scalp scar.
Endoscopic transsphenoidal surgery (through the nose): Tumours at the base of the brain — most commonly pituitary gland tumours — can often be reached through the nostril. A thin telescope (endoscope) and slender instruments are passed through the nose and a natural air-filled sinus to reach the tumour from below. There is no scalp cut and no bone flap in the skull, so many patients recover more quickly and go home sooner. This approach is only possible for tumours in this specific region.
Endoscopic and keyhole techniques: For some fluid cavities and deep tumours, an endoscope passed through a small opening allows the surgeon to remove tumour, take a biopsy or relieve trapped fluid (hydrocephalus) through a much smaller corridor than open surgery. Whether a minimally invasive route is suitable depends entirely on the tumour’s exact position, size and type — it is a matter of choosing the right tool for the right problem, not simply choosing the “smallest” option.
Awake craniotomy and stereotactic biopsy: specialised approaches
When a tumour sits close to areas that control speech or movement — what surgeons call eloquent areas — an awake craniotomy may be recommended. It sounds alarming, but it is a well-established, safe and remarkably effective technique. You are kept comfortably awake for part of the operation while the surgeon gently stimulates the brain and asks you to talk, count, name pictures or move your hand.
Because the brain itself has no pain sensors and the scalp is thoroughly numbed, you feel no pain. Your live responses act as a real-time map, showing exactly which areas must be protected. This allows the surgeon to remove more of the tumour while safeguarding your ability to speak and move — a level of precision that scans alone cannot provide.
In other situations, particularly when a tumour is deep, in a very delicate location, or when the diagnosis is unclear, the first step may be a stereotactic biopsy. Using navigation and a precisely calculated trajectory, the surgeon passes a fine needle through a tiny opening to take a small tissue sample. This confirms the exact tumour type under the microscope, which then guides whether further surgery, radiation or medicines are the best next step. Sometimes knowing precisely what a tumour is matters more than immediately removing it.
Inside the operating room: navigation, monitoring and closing
Modern brain tumour surgery is a team effort supported by advanced technology. While every operation is unique, the core steps usually follow a similar, carefully controlled sequence.
- Anaesthesia and positioning: You are put safely to sleep (or sedated for an awake case), and your head is gently held in a fixed position so the navigation stays accurate.
- Neuronavigation setup: The computer “GPS” is registered to your head, allowing the surgeon to see the tumour’s exact position on the pre-loaded MRI in real time throughout the operation.
- Opening: The scalp is opened and, for a craniotomy, the bone flap is temporarily removed to expose the tumour region.
- Intra-operative monitoring: Sensors track the electrical signals of nerves and muscles, warning the surgeon if they approach a critical pathway — an early-warning system that helps protect movement, sensation and other functions.
- Tumour removal: Under the microscope, the tumour is separated from healthy tissue and removed, with continuous attention to bleeding and to safe boundaries.
- Checking and closing: The surgeon confirms bleeding is controlled, replaces the bone flap and closes the scalp in layers. Sometimes an early scan is done to check how much tumour was removed.
Together, neuronavigation, the operating microscope, intra-operative monitoring and, where needed, awake mapping have transformed brain tumour surgery into a far more precise and safer procedure than it was even a generation ago.
Warning signs after surgery: when to seek help immediately
Recovery after brain tumour surgery is usually steady, but it is important to know which symptoms need urgent attention. If you or a family member notices any of the following after going home, contact your surgical team or the nearest emergency service without delay:
- A seizure or fit, or sudden jerking, twitching or a blank, unresponsive spell.
- A severe or rapidly worsening headache that is not relieved by prescribed medicine, especially with vomiting.
- New or increasing weakness, numbness, or difficulty moving an arm, a leg or one side of the face.
- New confusion, excessive drowsiness, or difficulty waking the person up.
- New trouble speaking, understanding, or sudden changes in vision.
- Signs of wound infection — increasing redness, swelling, pus, or the wound opening up.
- Fever with a stiff neck, or clear fluid leaking from the nose or the wound.
- A swollen, painful, red calf, or sudden breathlessness or chest pain, which can signal a clot.
Recovery timeline after brain tumour surgery
Recovery is not a single moment but a gradual journey, and its pace varies from person to person depending on the tumour type, its location and whether further treatment is planned. Understanding the usual stages helps set realistic expectations and reduces anxiety.
The first hours and days: Immediately after surgery, most patients spend time in a high-dependency or intensive care unit so that the team can monitor them closely. Nurses check your alertness, pupils, and strength frequently. Mild headache, tiredness and some swelling or bruising around the eye are common and expected. Many people are surprised by how quickly they are encouraged to sit up, drink and start moving.
In hospital: A typical stay is a few days to about a week, though this varies. You will gradually increase activity, and a physiotherapist, occupational therapist or speech therapist may begin working with you if needed. An MRI is often done in the early period to assess how much tumour was removed.
The first weeks at home: Fatigue is the most common and underestimated symptom — the brain uses a lot of energy to heal, so plenty of rest is essential. Simple daily activities usually resume within a couple of weeks, while returning to work, driving and a full routine typically takes about four to eight weeks. Driving in particular should only restart when your doctor confirms it is safe, especially if you have had any seizures.
Longer-term care: The removed tissue is examined under the microscope, and this final report determines whether any further treatment — such as radiation or medicines — is advised. Regular follow-up scans then keep watch over the long term. Recovery is a partnership between you, your family and your medical team.
When to consult a specialist
If you or a loved one has been diagnosed with a brain tumour, or is experiencing persistent symptoms such as a new type of headache, unexplained vomiting, seizures, progressive weakness, vision changes or personality changes, it is important to consult a qualified neurosurgeon promptly. Early, expert assessment allows the right plan to be made calmly, rather than in a crisis.
Complex decisions — whether to operate, which approach to use, and how aggressively to remove a tumour — benefit enormously from experience. Dr. Arun Saroha, a senior neuro and spine surgeon with over 20 years of experience who practises at Max Hospital, Gurugram & Dwarka, evaluates each case individually to recommend the safest and most effective path for that particular person. A second opinion is always reasonable and often reassuring.
Finally, remember that this article is meant for general understanding only and cannot replace a personal medical consultation. Every brain tumour, and every patient, is different. The best decisions come from a careful discussion between you and a specialist who has reviewed your own scans and history.
Concerned about a brain tumour or planning surgery?
If you have been diagnosed with a brain tumour or are living with worrying symptoms, do not face the uncertainty alone. Consult Dr. Arun Saroha, a leading neuro & spine surgeon in India, for a clear assessment and honest guidance on the safest treatment options for you.
Book a ConsultationFrequently Asked Questions (FAQs)
Not always. Some small, slow-growing or non-cancerous tumours that are not causing symptoms may simply be watched with periodic MRI scans. Others may be treated with radiation, radiosurgery or medicines. However, surgery is usually the first and most important step when a tumour is large, growing, pressing on the brain, causing symptoms, or when the doctor needs a tissue sample to confirm the exact diagnosis. Your neurosurgeon decides based on the tumour type, size, location and your overall health.
In the most common operation, called a craniotomy, the surgeon temporarily removes a small piece of skull bone to reach the tumour, carefully separates it from healthy brain tissue and takes it out, then replaces the bone. The surgeon uses an operating microscope, computer-guided navigation and often nerve monitoring to remove as much tumour as safely possible while protecting healthy brain. Some tumours can instead be reached through the nose (transsphenoidal) or with a small endoscope.
Sometimes the whole tumour can be removed, especially when it is well-defined and located away from critical areas. But the true goal is ‘maximal safe resection’ — removing as much tumour as possible without damaging areas that control movement, speech, vision or memory. If a tumour is wrapped around vital structures, the surgeon may deliberately leave a thin rim behind and treat it later with radiation or medicines, because safety and quality of life come first.
In an awake craniotomy, you are kept comfortably awake for part of the operation while the surgeon works on a tumour that sits close to areas controlling speech or movement. The team asks you to talk, count or move your hand while gently testing the brain, so they can map safe boundaries in real time. This helps remove more of the tumour while protecting these vital functions. You feel no pain because the brain itself has no pain sensors and the scalp is fully numbed.
Yes, for certain tumours at the base of the brain, especially pituitary gland tumours, surgeons use an endoscopic transsphenoidal approach. A thin telescope and instruments are passed through the nostril and a natural sinus to reach the tumour, so there is no scalp cut and no bone flap in the skull. Recovery is often quicker and there is no visible scar. Whether this route is possible depends entirely on the tumour’s exact location and size.
Most people stay in hospital for a few days to about a week, often with a short period in a high-dependency or intensive care unit right after surgery. Simple daily activities usually resume within a couple of weeks, while returning to work, driving and full routine typically takes about four to eight weeks. Recovery varies with the tumour type, its location and whether further treatment such as radiation is needed. Your surgeon and rehabilitation team guide the pace.
All brain surgery carries some risk, including bleeding, infection, seizures, swelling or temporary weakness in speech or movement. However, modern techniques such as neuronavigation, intra-operative monitoring, high-powered microscopes and awake mapping have made these operations far safer than in the past. The actual risk depends on the tumour’s size, type and location, and on the surgeon’s experience. A detailed discussion of your specific risks and benefits is an essential part of planning.
In most modern operations only a small strip of hair around the planned incision is shaved, not the entire head, so the change is usually hidden once hair grows back over the scar. The incision is planned carefully behind the hairline where possible. For surgery done through the nose there is no head shaving at all. Ask your surgical team beforehand so you know exactly what to expect on the day of surgery.