Is Brain Tumour Surgery Risky? What Families Should Know

When a doctor says your parent’s brain tumour needs surgery, the first thought is usually: is brain tumour surgery risky, and are we about to make things worse? Yes, it carries real risk.

But how much depends on the tumour, where it sits and your parent’s overall health, and leaving a tumour alone has risks of its own. This page is meant to help you decide, not to push you either way.

Quick answer: Brain tumour surgery is a major operation with real risks, including bleeding, infection, swelling, seizures and, depending on location, changes in movement, speech, vision or memory. No single percentage applies to everyone; the surgeon can give figures specific to your parent’s scan, tumour type and health. Delay can also be dangerous, so the useful question is which risk is smaller for your parent.

The risks are real, and they are mostly tied to location

Brain surgery risk is tied to the part of the brain being operated on. If a tumour sits close to the area that controls speech, speech can be affected; near the motor area, strength on one side can be affected. That is why two families can be told very different things about “brain tumour surgery” and both be right.

Published surgical series show the pattern. In one review of open skull base surgery (Complications of brain tumor surgery, NIH), roughly one in three patients developed some complication, and the most frequent was injury to a cranial nerve. Skull base tumours are among the more demanding locations, so please do not read that as the figure for every tumour.

Large hospital-database studies of surgery for malignant tumours (Surgical complications following malignant brain tumor surgery, NIH) found that events such as wrong-side surgery or a retained object are rare (under 0.7 per 1000 cases), and meningitis occurred in about 1.1 per 1000. Systems and checklists exist precisely to prevent the first two.

What each risk looks like in practice

• Bleeding: a clot can form in the space where the tumour was. It is why every patient is watched closely, and often scanned, soon after surgery.
• Swelling: the brain swells after handling, which can cause drowsiness or worsen weakness. Steroids are commonly given to limit this.
• Infection: wound infection or meningitis. It is closely linked to leakage of cerebrospinal fluid (CSF), especially in operations at the back of the skull, so careful closure matters. Antibiotics are given around surgery.
• Seizures: either already present or new after surgery. Anti-seizure medicine is often started before or around the operation.
• Neurological change: weakness, speech difficulty, vision change, balance trouble or memory and thinking problems. Some are temporary because of swelling and settle over weeks; some can be lasting. We say this plainly to families because it is the honest answer.
• General surgical risks: anaesthetic reactions, blood clots in the legs, chest infection, especially in patients who stay in bed longer.

Type of tumour and your parent’s health change the picture

A slow-growing benign tumour in an accessible spot, such as many meningiomas, is a very different operation from an infiltrating glioma, the group that includes glioblastoma, the most aggressive and most common malignant primary tumour in adults.

With the first, the aim is often complete removal. With the second, the aim is often to remove as much as can be done safely and get tissue for diagnosis, followed by other treatment.

Age alone is not the deciding factor. What matters more is heart and lung health, diabetes, blood pressure, kidney function, blood-thinning medicines and how well your parent is moving and thinking now.

We have written separately on what age actually changes about risk and recovery. Before surgery, expect medicines to be adjusted: blood thinners may need stopping a few days to a week beforehand, and steroids, antibiotics or anti-seizure drugs may be started.

How the surgical team lowers the risk

Much of modern neurosurgery is about reducing the chance of harm:

• Imaging navigation lets the surgeon plan the route using the patient’s own MRI and confirm position during surgery.
• Mapping of critical areas and monitoring of nerve and brain function help avoid damage to movement and speech pathways.
• Awake surgery in selected cases: when a tumour is near speech or movement areas, the patient is woken during the operation and asked to speak or move while the surgeon works. It is not for everyone. See how awake brain surgery works.
• Close post-operative monitoring so bleeding, swelling or seizures are caught early.

Dr. Shyam D at Bangalore Neuro Centre, Manipal Hospital Electronics City, performs brain tumour surgery, including awake brain surgery where it is suitable, and can explain which approach fits your parent’s scan.

Not operating has risks too

Families sometimes hear “wait and watch” as the safe option. Sometimes it is, for a small, slow-growing tumour with no symptoms, where scans are repeated at set intervals. But a growing tumour can raise pressure inside the skull, causing worsening headache, vomiting, drowsiness and vision loss, and can steadily damage the very functions the surgery would try to protect.

A patient who is stronger and clearer today is usually a safer surgical candidate than the same patient after months of decline. A second opinion is reasonable and we encourage it, but do it within days to a couple of weeks, not months, unless the surgeon has told you the tumour can safely be watched.

Treatment options without surgery

Surgery is not the only tool, though it is often the first step because it relieves pressure and gives a tissue diagnosis. Depending on the tumour, other options include:

• Observation with regular MRI for small, silent, slow tumours.
• Radiotherapy, including focused stereotactic radiosurgery for some small tumours.
• Chemotherapy and targeted drugs, usually alongside surgery or radiotherapy for certain tumour types.
• Medicines for symptoms: steroids for swelling, anti-seizure drugs.

These are often combined rather than chosen against each other, and the plan is best settled with a neurosurgeon and an oncologist together.

Recovery: what the first weeks and months look like

These are general ranges; stay and recovery depend on tumour type, size, location, complications and any follow-on treatment.

Call the surgeon urgently, or go to emergency, for a seizure, new or worsening weakness, confusion or unusual drowsiness, severe or worsening headache with vomiting, fever, or fluid or redness at the wound. Do not wait for the next appointment.

Can life be normal afterwards?

For many people, yes, or close to it, particularly after complete removal of a benign tumour. Others live well with some changes: tiredness, slower thinking or a need for ongoing medicines.

Outlook for aggressive tumours depends heavily on the type; a stage 4 or high-grade cancer figure quoted online cannot be applied to one person, and we would rather you hear a case-specific answer from the surgeon and oncologist than a headline number.

How to help your parent, including with mood and anger

Practical help matters as much as the operation. Go to appointments, keep a written medicine list, and note symptoms and seizures with times. Encourage short walks and rest, supervise bathing and stairs, and ask about physiotherapy or speech therapy early.

Yes, a brain tumour can cause irritability and anger outbursts, particularly when it involves the frontal or temporal lobes, and steroids, fatigue, fear and some anti-seizure drugs can add to it. It is the illness and its treatment speaking, not a change in who your parent is. Stay calm, keep routines simple, avoid arguing in the moment, and tell the doctor, because medicine changes or counselling can help.

Questions to take to the consultation

1. What exactly is the tumour likely to be, and what do we still not know?
2. What are the specific risks for this location, and how likely are they for my parent?
3. How often do you perform this type of operation?
4. Which techniques will you use here: navigation, mapping, awake surgery?
5. What is the aim: complete removal, partial removal or diagnosis?
6. What happens if we wait, and how long is safe?
7. What further treatment will probably follow?
8. Who looks after my parent after surgery, and whom do we call at night?

A good surgeon welcomes these. Our guide on how to choose a neurosurgeon goes further.

Frequently asked questions

Will my parent’s personality change after surgery?

Not usually, but tumours or surgery in the frontal and temporal regions can affect mood, motivation or memory. Tell the team about any change you notice so it can be treated.

Is a second opinion insulting to the surgeon?

No. For a decision this large it is normal. Take the scans and reports with you, on a disc as well as the written report.

Can we find out the cost beforehand?

Yes. Cost depends on the procedure, stay and room type; see our guide to brain tumour surgery costs.

Related guides

• 7 warning signs of a brain tumour you should never ignore
• Awake brain surgery: how it works
• Brain tumour surgery cost in Bangalore
• Neurosurgery in elderly patients

Sources

• Brain Surgery: Purpose, Recovery, Risks & Types — Cleveland Clinic
• Complications of brain tumor surgery – PMC – NIH — U.S. National Institutes of Health
• Surgical complications following malignant brain tumor surgery — U.S. National Institutes of Health
• Brain Tumor: Signs, Symptoms, Causes & Treatment — Cleveland Clinic

This article explains general medical information. It is not a diagnosis — please see a qualified doctor about your own symptoms.