Oncology: The disease, dynamics & challenges of market research

Brain Cancer And Gliomas

Glioma is a broad category of brain and spinal cord tumors that come from glial cells - brain cells that support nerve cells.

The symptoms, prognosis, and treatment of a glioma depend on the person's age, the exact type of tumor, and the location of the tumor within the brain. These tumors tend to grow and infiltrate into the normal brain tissue, which makes surgical removal very difficult -- or sometimes impossible -- and complicates treatment.

These brain tumors are often diagnosed in older adults, depending on the type of glioma. Brain tumors are slightly more likely to occur in males. Most gliomas that occur in children are low-grade.

Prior radiation to the brain is a risk factor for malignant gliomas. Some genetic disorders also increase the risk of development of these tumors in children but rarely in adults.

There are no lifestyle risk factors associated with malignant gliomas. This includes alcohol, cigarette smoking, or cell phone use.

While many benign brain tumors are gliomas, almost 80% of malignant brain tumors are gliomas.

Gliomas are named based on the specific type of glioma, or brain cell, affected. According to the American Cancer Society, there are three types of gliomas, including astrocytomas, oligodendrogliomas, and ependymomas. 

Ependymomas make up less than 2% of all brain tumors and less than 10% of all brain tumors in children. These tumors come from the ependymal cells and because they often do not spread into the normal brain tissue, some ependymomas can be cured by surgery. They rarely spread outside the brain. But they do have a high risk of local recurrence and thus are considered malignant.

Astrocytomas start in brain cells called astrocytes. Most of these brain tumors cannot be cured because they spread all through the normal brain tissue. Astrocytomas are usually classified based on criteria used by a doctor examining the biopsy under a microscope. Tumors that are grade 1 grow the slowest, while grade 4 tumors, the highest grade, are the fastest growing.

Oligodendrogliomas are tumors that spread in a similar manner to astrocytomas. Some of these tumors may be slow-growing but still spread into nearby tissue. Sometimes they can be cured. A higher-grade anaplastic oligodendroglioma grows and spreads more quickly and usually can't be cured.

Symptoms of a glioma are similar to those produced by other malignant brain tumors and depend on the area of the brain affected. The most common symptom is headache -- affecting about half of all people with a brain tumor. Other symptoms can include seizures, memory loss, physical weakness, loss of muscle control, visual symptoms, language problems, cognitive decline, and personality changes. These symptoms may change, according to which part of the brain is affected.

Symptoms may worsen or change as the tumor continues to grow and destroys brain cells, compresses parts of the brain, and causes swelling in the brain and pressure in the skull.

If a brain tumor is suspected, a brain scan is typically done. This includes a CT scan, an MRI scan (considered to be superior), or both. If the brain scan suggests a brain tumor, a biopsy may be performed for diagnosis. A biopsy may be done as a separate procedure or at the time the tumor is removed if surgery is a treatment option. When a biopsy is done separately either because you are too ill or the tumor is in a critical part of your brain, doctors can perform a procedure called: stereotactic needle biopsy. It is used to take a sample of the tumor.  A small opening in the skull is made, then a needle is inserted through the opening to obtain tissue from the brain tumor.

Gliomas are characterized by subtypes and by a numerical grading system. The grade of a tumor is determined by how the cancer cells appear under a microscope and by the genetic profile of the tumor. Grade I tumors grow slowly and can sometimes be totally removed by surgery, while grade IV tumors are fast-growing, aggressive, and difficult to treat.

According to the current World Health Organization (WHO) scheme, malignant astrocytomas are classified and graded as follows:

Grade 1 gliomas include pilocytic astrocytomas and are more common in children.

Grade 2 tumors are diffuse astrocytomas and are low-grade.

Grade 3 gliomas are diffuse and called anaplastic astrocytoma. They're considered high-grade.

Grade 4 glioblastoma are considered high-grade.

The oligodendroglial tumors are classified as follows:

Grade 1 or low-grade oligodendroglioma

Grade 2 or anaplastic oligodendroglioma.

The ependymal tumors are classified and graded as follows:

Grade 1 or low-grade ependymoma

Grade 2 or low-grade ependymoma that is more likely to recur than grade 1

Grade 3 or high-grade ependymoma that is fast growing

The low-grade tumors usually grow slowly but may transform into high-grade tumors.

Different treatment options are considered for malignant glioma, depending on the location of the tumor, type of glioma (cell type), and grade of malignancy. The patient's age and physical condition also play a role in determining treatment. Treatment for gliomas is multifaceted and may include:

Tumor removal by surgery. The patient should be otherwise relatively healthy, and brain function, speech, and mobility is able to be maintained. Imaging techniques such cortical mapping and functional MRI may be used to assist the surgeon in removing the tumor. The goal is to remove as much of the tumor as possible without affecting important brain function. Recurrences of the tumor are frequent.

Radiation therapy uses high-energy X-rays or other radiation to kill the cancer cells.

Chemotherapy uses drugs to stop the cancer cell growth. This therapy may be taken by mouth or injected.

Targeted therapy is a newer type of treatment that may be used to help shrink tumors. It works differently than chemotherapy in that it targets certain proteins that help tumors grow.

Alternating electric-field therapy uses electrical fields to target cells in the tumor while not hurting normal cells. It's done by putting electrodes directly on the scalp. The device is called Optune Gio. It's given with chemotherapy after surgery and radiation. The FDA has approved it for use in both newly diagnosed adults and adults whose glioblastoma has come back.

Supportive therapy to improve symptoms and neurologic function include corticosteroids to reduce swelling in the brain caused by the tumor and anticonvulsants to control or prevent seizures.

Clinical trials, performed to see if new cancer therapies are effective and safe, are another option.

Treatment for Low-Grade Astrocytomas

The primary treatment for low-grade astrocytomas is surgery. However, because these tumors penetrate deep into the brain and grow into normal brain tissue, surgery is sometimes difficult. Radiation is often recommended after surgery or if there is a recurrence. Chemotherapy may also be used after surgery or as part of the treatment of recurrences. Targeted therapy may be used in some people.

Treatment for High-Grade Astrocytomas

Treatment for high-grade astrocytomas (Grade III anaplastic astrocytomas or Grade IV glioblastomas multiforme) is surgery, if possible. After surgery, radiation therapy, in conjunction with chemotherapy, is the next step. Targeted therapy may be used in some people. Sometimes surgery to remove the high-grade tumor is not possible. Then radiation and chemotherapy are used. If the tumor returns, the surgery may be repeated along with other forms of chemotherapy. Clinical trials may also be recommended to allow patients to use new therapies.

Treatment for Oligodendrogliomas

For oligodendrogliomas, surgery is the first choice of treatment to help relieve symptoms and increase patient survival. Radiation with or without chemotherapy may be given after surgery. Also, chemotherapy or radiation may be used to shrink a tumor before surgery. If surgery cannot be done, then chemotherapy with or without radiation therapy may be used.

Treatment for Ependymomas and Anaplastic Ependymomas

Ependymomas and anaplastic ependymomas usually do not pass into normal brain tissue as do other gliomas. Therefore, surgery may be highly effective if all of the tumor is removed. However, ependymomas may seed the cerebrospinal fluid so the entire spinal canal needs evaluation with MRI scanning. These tumors are highly responsive to radiation. 

High-grade gliomas are fast-growing tumors. With a poor prognosis, especially for older patients.

Brain Tumors

A brain tumor (also called an intracranial tumor) is a cluster of abnormal cells that grows in or around your brain. There are over a hundred types of tumors that develop in the human brain.

A brain tumor is a cluster of abnormal cells that grow in or around your brain. (Photo Credit: Science Photo Library/Getty Images)

Most brain tumors are benign, which means they grow slowly, have clearly defined borders, and are less likely than malignant tumors to invade surrounding tissues or other parts of your body. Benign tumors may not cause any symptoms or long-term problems unless they grow large enough to press on other areas of your brain.

About a third of brain tumors are malignant, which means they:

May grow quickly

Have irregular borders

Easily spread to surrounding tissues and other parts of your body

Read on to learn more about the different types of brain tumors.

Brain tumors develop because the DNA in the cells that make up the tumor has been damaged in such a way that the cells no longer function in the way they're supposed to. But experts don't know exactly how this happens. When the DNA is damaged in this way, the abnormal cells multiply and grow faster than your normal cells, which forms the tumor.

Usually, environmental exposure adds to the DNA damage. Sometimes, people are born with DNA damage and they get tumors at a very young age. 

Most of the time, doctors can't tell what causes a brain tumor. There are only a few known risk factors for brain tumors in adults.

Exposure to radiation. Children who receive radiation to the head have a higher risk of getting a brain tumor as adults.

Family history. Some brain tumors are linked to certain rare genetic conditions such as neurofibromatosis or Li-Fraumeni syndrome.

Age. People between ages 65 and 79 make up the population most likely to be diagnosed with a brain tumor.

No history of chickenpox. One study has found that people who had chickenpox are less likely to get gliomas.

Benign brain tumors generally grow more slowly than malignant brain tumors and don't tend to spread to surrounding tissues. But these can still be serious and even life-threatening, depending on:

Where in your brain it is

How big it is

If it's compressing other areas of your brain

If it's interfering with blood flow or cerebrospinal fluid movement in your nervous system 

Benign brain tumors usually have clearly defined borders and aren't deep-rooted in your brain. This makes them easier to remove with surgery if they're in an area of the brain where it's safe to operate. Some brain tumors can come back after they're removed. But benign tumors are less likely to come back than malignant ones.

Malignant primary brain tumors are malignant tumors that start in the cells of your brain. These typically grow faster than benign tumors and may quickly invade surrounding tissue. Although brain cancer rarely spreads to other organs, it can spread to other parts of your brain and central nervous system.

Secondary brain tumors are malignant tumors that started in other cells of your body. They come from cancer that started somewhere and spread (metastasized) to your brain. About 1 in 4 people with cancer develop a secondary brain tumor. 

Cancers that are most likely to metastasize to your brain include:

Breast cancer

Lung cancer

Kidney cancer

Melanoma

Thyroid cancer

Lymphoma and leukemia

Experts have classified over 150 types of brain tumors. Primary brain tumors are named for the kind of cell in which they start in your central nervous system. Your central nervous system is made up of your brain and spinal cord. 

Benign brain tumor types

Examples of benign brain tumors include:

Meningiomas

About 10%-15% of all brain tumors are meningiomas (pronounced muh-nih-jee-ow-muhs). These are the most common benign brain tumors, although a small percentage are malignant. These tumors start in your meninges, which are the tissues that cover and protect your brain and spinal cord. As meningiomas grow, they can put pressure on your brain tissues, cranial nerves, and blood vessels. In some cases, they grow into the bones of your head and face, which my change the shape of your skull and face.

Schwannomas 

These may also be called vestibular schwannomas (pronounced shwuh-now-muhs), neurilemmomas (pronounced nyoor-uh-lem-oh-muhs), or acoustic neuromas (pronounced nr-ow-muhs). Schwannomas are common benign tumors in adults. They start in the cells that line your nerves and provide insulation for the electrical impulses that move between your nerve cells. They can start around any cranial or spinal nerve, but they most often start around the eighth cranial nerve, or the vestibulocochlear (pronounced vuh-sti-byoo-low-kow-klee-ur) nerve. This is the nerve that connects your ear and brain. They can cause complications if they grow and put pressure on your nerves and brain.  

Pituitary adenomas 

About 13% of all brain tumors are pituitary (pronounced puh-too-uh-teh-ree)  tumors. They start in your pituitary gland, which is deep inside your brain. Your pituitary gland makes and releases several hormones that are necessary for many of your bodily functions, including metabolism, reproduction, and your water and salt balance. They're generally benign, slow-growing, and rarely spread to other tissues. Pituitary tumors are most common in adults over age 50, but sometimes children get them. Because your pituitary gland is so deep inside your brain, these tumors are difficult to remove. But medical treatment with hormone replacement therapy is usually successful. 

Chordomas

Chordomas (pronounced kor-doe-muhs) are rare, slow-growing tumors that most commonly start at the base of your skull or the lower part of your spine (also called the sacrum). They start in cells that are left over from when you were developing as a fetus. Most people who are diagnosed with a chordoma are between 50 and 60 years old. These are mostly benign tumors, but they can grow into bone that's near the tumor and put pressure on it, which can cause symptoms. They may block your ventricles, which are four cavities deep in your brain where your cerebrospinal fluid is made. Your cerebrospinal fluid nourishes and protects your brain and spinal cord. If the tumor blocks your ventricles, you may get water on the brain (hydrocephalus).

Craniopharyngiomas

Craniopharyngiomas (pronounced kray-nee-ow-fe-ruhn-jee-ow-muhs) are benign tumors that usually start in the base of your brain near your optic nerves or your hypothalamus, above your pituitary gland. Like chordomas, these start in cells that are left over from fetal development. They most often occur in adults in their 50s and 60s, though they can happen in children, too.

Malignant brain tumor types

About 78% of malignant brain tumors in adults are gliomas (pronounced glai-ow-muhs). These start in your glial cells, which are the cells that give structural support to the other cells in your brain. Glial cells include astrocytes, ependymal cells, and oligodendroglial cells. Tumors that start in these types of glial cells include:

Astrocytomas

About half of all primary brain and spinal cord tumors are astrocytomas (pronounced a-strow-sai-tow-muhs). These tumors can start in many parts of your brain, but they're most common in your cerebrum. Your cerebrum is the largest part of your brain, and it controls many functions, including movement, temperature regulation, speech, judgment, thinking, reasoning, problem-solving, emotions, and learning. They can happen in people of any age, including children, but they are most common in adults, especially middle-aged men and people assigned male at birth. In children, they're mostly low-grade, but in adults, they're mostly high-grade. 

One form of astrocytoma is called glioblastoma multiforme (GBM). This tumor type can start in several types of cells, including your astrocytes and oligodendrocytes. These tend to grow very fast and spread to other tissues. They're most common in people 50-70 years old, especially men and people assigned male at birth. It's a very challenging tumor to treat because there are four subtypes that respond differently to the available treatments.

Ependymomas

About 2%-3% of brain tumors are ependymomas (pronounced uh-pen-duh-mow-muhs). They occur in children and adults. They start in the ependymal cells that line the ventricles in your brain where your cerebrospinal fluid is made. They may block the flow of your cerebrospinal fluid and cause hydrocephalus. They may also extend into your spinal cord.

Medulloblastomas

Medulloblastomas (pronounced muh-doo-luh-bla-stow-muhs) usually start in your cerebellum or near your brain stem and are most common in children. Your cerebellum is a part of brain at the back of your head that helps control your voluntary muscle movements, and maintain your posture, sense of balance, and equilibrium. Medulloblastomas tend to be high-grade tumors, but they also respond well to radiation and chemotherapy.

Oligodendrogliomas

Oligodendroglimas (pronounced aa-luh-gow-den-drow-glai-ow-muhs) usually start in cells that make myelin, which is the electrical insulation for your nerve cells. They tend to occur more frequently in the frontal and temporal lobes. Your frontal lobe is at the front of your head and controls things like your personality, ability to make decisions, and ability to move voluntarily. Your temporal lobes are at the sides of your head, just above and behind your ears. These lobes control your short-term memory, speech, ability to recognize musical rhythm, and some of your ability to detect smells. Oligodendrogliomas are more common in adults in their 20s to 40s but can happen in children too. They seem to be more common in men and people assigned male at birth than women and people assigned female at birth.

Experts generally classify brain tumor types using the World Health Organization (WHO) system for classifying tumors of the central nervous system. This system is based on what the tumor cells look like under a microscope and what is happening with the genes and proteins in these cells. 

These classifications are called "grades," and they give your doctor an idea of how fast the tumor is likely to grow and whether it's likely to spread. In general, grade 1 and 2 tumors are benign, and grade 3 and 4 tumors are malignant. But some low-grade tumors become high-grade over time. 

Using this information, your doctor can help you pick out your best treatment option.

Grades include:

Grade 1 (low-grade): The tumor cells look very much like healthy cells in the same tissues. These tumors are the least likely to grow and spread.

Grade 2 (low-grade): The tumor cells may have some abnormalities that make them look less like healthy cells. These tumors usually grow slowly, but they may also grow into nearby areas of your brain.

Grade 3 (high-grade): The tumor cells look clearly abnormal. These tumors may grow fast and spread to other parts of your brain and spinal cord.

Grade 4: (high-grade): The tumor cells look very abnormal. These tumors tend to grow very fast and spread to other parts of your brain and spinal cord. They also tend to return after treatment.

Symptoms of brain tumors vary according to the type of tumor and where it is in your brain. Since different areas of your brain control different functions of your body, the tumor's location affects the symptoms you have.

Some tumors may cause no symptoms unless they grow large and press on other areas of your brain. Then, they may cause serious, rapid changes in your health. Other tumors may have symptoms that develop slowly over time.

Symptoms that a number of brain tumors have in common include:

Headache s. These may be more serious in the morning or may wake you up at night.

Seizures, particularly if you don't have a history of seizures

Problems thinking, speaking, or articulating your thoughts

Changes in your personality or behavior

Weakness or paralysis in one side of your body

Dizziness or problems with your sense of balance

Changes in your ability to hear or ringing in the ears (tinnitus)

Changes in your vision

Numbness or tingling in your face

Nausea, vomiting, or trouble swallowing

Confusion or disorientation

You can get many of these symptoms from lots of conditions. So don't assume you have a brain tumor just because you have some of them. If you do have some of these symptoms, it's time to go in for a checkup with your doctor.

Brain tumors are one of most common solid tumor types in kids and teens. And about 72% of the children who are diagnosed with a brain tumor are younger than age 15. Children can get several types of brain tumors, but the tumors usually start in different tissues from those in adults.

The following tumor types are more common in kids than adults:

Brain stem glioma

Craniopharyngioma

Ependymoma

Juvenile pilocytic astrocytoma (JPA)

Medulloblastoma

Optic nerve glioma

Pineal tumor

Primitive neuroectodermal tumors (PNET)

Rhabdoid tumor

Diagnosis can be a complicated process that involves several specialists. Your doctor will likely start by asking questions about your symptoms, overall health, and family health history. Then they'll do a physical exam, including a neurological exam. During a neurological exam, your doctor will test your:

Balance and coordination

Mental status

Hearing and vision

Reflexes

If they suspect a brain tumor, your doctor may request one or more of the following tests:

Imaging studies, such as a computed tomography (CT) scan or magnetic resonance imaging (MRI) of your brain. They will most likely use an MRI, which is the best imaging test to identify a brain tumor, but they may use a CT scan if you can't have an MRI for some reason. You will likely need to be injected with a contrast agent before your test. This makes the tumor easier to see.

Tumor marker tests. Certain tumors will produce specific chemicals called tumor markers. Your doctor can test for these in your blood, pee, or tissue.

Biopsy. A neurosurgeon may take a biopsy when you go in for surgery to have the tumor removed. Or, they may do a stereotactic biopsy, during which they take a sample of your tissue through a needle inserted into a small hole in your skull.

Spinal tap (also called lumbar puncture). Your doctor will do this if they suspect that the tumor has invaded the tissue surrounding your brain (meninges). During this procedure, they remove a sample of cerebrospinal fluid from your spine to look for cancer cells.

Your doctor may also do testing called biomarker testing on your biopsy sample. They may also call this testing tumor testing, genomic testing, genomic profiling, molecular testing, or molecular profiling. Biomarker testing gives your doctor information about what's happening with the genes and proteins in your tumor. Biomarker testing can help confirm their diagnosis, and give them an idea about which treatments may be the best options for you and what your prognosis may be.

Your doctor will consider several things in deciding how to treat your brain tumor, including:

Location of the tumor

Size of the tumor

Type and grade of the tumor

Whether the tumor has spread

Your overall health

Potential complications

Watch and wait

If your tumor is small and not causing you symptoms, your doctor may suggest watching and waiting, also called watchful waiting or active surveillance. This is when your doctor monitors your health with regular testing. If you start to get symptoms or it looks like your tumor is growing, they will help you choose another treatment option.

Surgery

In most cases, your doctor will want to remove the tumor. Your neurosurgeon will try to remove as much of the tumor as possible without injuring your brain tissue. Your neurosurgeon may do this with a craniotomy. During a craniotomy, your neurosurgeon will remove part of your skull to access your brain during surgery. They will usually use imaging or another surgical navigation system to help them find and completely remove the tumor without damaging your other brain tissues.

If you have hydrocephalus, you may also need a ventriculoperitoneal shunt inserted to help blocked cerebrospinal fluid drain out of your skull. This is usually a permanent fitting that drains your cerebrospinal fluid into the area around the organs in your belly. 

Chemotherapy and radiation therapy

Some tumors can't be surgically removed because of their location in the brain. In those cases, your doctor will likely suggest chemotherapy,  radiation therapy, or both to help shrink or remove your tumor. You may also get chemotherapy and radiation therapy after surgery to help kill any remaining cancer cells.

Chemotherapy uses medicines to kill cancer cells or slow their growth. Studies show that chemotherapy can improve overall survival in about 20% of people with primary malignant brain tumors. Currently, doctors have no way of predicting who will benefit the most from chemotherapy. But chemotherapy seems to be most effective for some pediatric tumors, lymphomas, and some oligodendrogliomas. Some chemotherapy medicines that are used for brain tumors include:

Temozolomide

Nitrosourea, such as Lomustine and carmustine

Irinotecan (Camptosar)

Radiation therapy uses a radiation source, such as X-rays, gamma rays, neutrons, and protons, to damage the DNA in cancer cells. This can kill the cancer cells and shrink your tumor. Modern radiation therapy methods reduce your risk of long-term radiation injury. This is because modern methods direct the radiation as specifically as possible at your tumor and protects your surrounding tissue. You may get radiation therapy using an external source of radiation, such as:

Standard external beam radiation therapy

Proton beam treatment

Stereotactic radiosurgery (also called Gamma Knife or CyberKnife)

You may also get brachytherapy, or internal radiation therapy, where your neurosurgeon places the radiation source in your brain at the time of surgery to help kill any remaining tumor cells.

Immunotherapy

Immunotherapy (or biologic therapy) uses medicines that help your immune system kill cancer cells. Some medicines may tag the cancer cells so that your immune system can recognize them more easily. Other medicines may boost your immune system to fight the cancer cells. Some examples of immunotherapy include:

CAR T-cell therapy

Engineered viruses

Immune checkpoint inhibitors, such as ipilimumab, nivolumab, and pembrolizumab

Monoclonal antibodies, such as nivolumab and pembrolizumab (these are both immune checkpoint inhibitors and monoclonal antibodies)

Treatment vaccines

Laser interstitial thermal therapy (LITT)

This is a newer technique where your doctor inserts a small catheter into the tumor and then uses a laser to kill and remove it. LITT is also used to treat some forms of epilepsy.

Palliative care

Palliative care focuses on relieving your symptoms and improving your quality of life when you're managing an incurable condition. For instance, you may get medicines to help relieve your pain, nausea, or anxiety. You may also see a therapist, social worker, or spiritual adviser as part of your care. Talk to your doctor about adding palliative care to your treatment plan. Research shows that palliative care can help you live your best life longer when you're managing a long-term health condition.

Because treatment for cancer can damage healthy tissue, talk to your doctor about possible long-term effects of treatments in your plan. For instance, your doctor can explain the importance of rehabilitation after your treatment. Rehabilitation could involve working with several therapists, such as:

Physical therapists to regain strength and balance

Speech therapists for help with speaking, expressing thoughts, or swallowing

Occupational therapists to help manage daily activities such as using the bathroom, bathing, and dressing

Your individual circumstances play a very large role in your prognosis. For instance, survival rates vary based on many things, including:

What type and grade of tumor you have

Where the tumor is located

Whether the tumor can be removed by surgery

Whether this is a new tumor or has come back after previous treatment

How much your tumor affects your ability to function

Your overall health

The five-year relative survival rate for all patients with a primary brain tumor is 76%. For people with benign brain tumors, the five-year relative survival rate is 92%.

If you were recently diagnosed with a brain tumor, ask your doctor these questions at your next visit.

1. What type of brain tumor do I have, and what is its grade?

2. What are the symptoms of brain cancer?

3. Which part of my brain is affected by the tumor, and what does this region of the brain do?

4. Will it be possible to surgically remove my tumor?

5. If you can't surgically remove the tumor, will I need other treatments, such as chemotherapy or radiotherapy?

6. What are the possible side effects of these therapies?

7. Who might my treatment team include, and for how long will I continue to see them?

8. Are there alternative treatments for my condition?

9. Will there be any lasting problems from this disease or its treatment?

10. Are there any support groups in the area that I can contact?

A brain tumor is a clump of abnormal cells that grow in or around your brain. There are over a hundred types of brain tumors, including benign and malignant tumors. Most brain tumors are benign, which means they tend to grow slowly and are less likely to spread to other areas. Your doctor will do some tests to determine the grade of your tumor. This gives them an idea of how likely it is to grow and spread. Your treatment options will depend on what type of tumor you have and what grade your tumor is.

Can a brain tumor be cured?

Yes, in some cases, it's possible to cure a brain tumor. For instance, if your tumor is benign, you may be cured when you have surgery to remove it. If your tumor is malignant, it may also be possible to cure if it's caught early and removed with surgery.

Is it possible to live with a brain tumor?

Yes, many people with a benign brain tumor can live years without symptoms. And some people with a malignant tumor may be cured with surgery or radiation therapy. Over a third of people with a malignant brain tumor live at least five years after they're diagnosed. 

What is the success rate for brain tumor surgery?

This is a challenging question to answer because the success rate for surgery depends on many things, including whether your tumor is benign or malignant, what type of surgery you're having, if it's possible to completely remove the tumor, and how healthy you are when you have surgery. Ask your neurosurgeon about their success rate for the specific procedure you're having.

Carmustine Implants And Temozolomide For The Treatment Of Newly Diagnosed High-grade Glioma

2.1 Gliomas are the most common type of brain tumour. They develop from the glial cells that support the nerve cells of the brain and spinal cord. There are four main types: astrocytoma, ependymoma, oligodendroglioma and mixed tumours. Gliomas are graded according to their likely rate of growth, from grade 1 (slowest growing) to grade 4 (fastest growing). Grade 3 and 4 gliomas are considered high-grade gliomas. Grade 3 gliomas include anaplastic astrocytoma, anaplastic ependymoma, anaplastic oligodendroglioma and anaplastic oligoastrocytoma. Grade 4 gliomas are usually GBM.

2.2 Brain tumours account for fewer than 2% of all primary cancers. Approximately 1860 new cases of malignant glioma are diagnosed in England and Wales each year. High-grade gliomas are more common in men than women, and the incidence increases with age. People diagnosed with GBM are on average older than people diagnosed with grade 3 gliomas.

2.3 Symptoms of high-grade glioma depend on the size, location and degree of infiltration of the tumour. They include headache, nausea, vomiting, seizures, visual disturbance, speech and language problems, and changes in cognitive and/or functional ability. Functional ability of patients can be categorised using scales of performance status, such as the WHO performance status classification (see appendix C for details).

2.4 Approximately 30% of adults with high-grade gliomas survive for at least 1 year, and 13% survive for 5 years. The median survival of patients with anaplastic astrocytoma is around 2–3 years, and that of patients with GBM is approximately 1 year. Age, performance status and tumour histology are indicators of pretreatment prognosis. Patients with high-grade gliomas have a better prognosis if they are younger, have a better performance status, or have a grade 3 tumour.

2.5 Diagnosis of high-grade glioma is provisionally made through a computed tomography (CT) scan or MRI. The diagnosis is then confirmed and the tumour classified histologically, either at the time of surgical resection or by a single-event biopsy if surgery is not possible. There is a growing understanding of the molecular genetics of gliomas, which is allowing a more accurate classification of glioma and may give an indication of prognosis and likely response to treatment.

2.6 In the UK, treatment usually consists of surgical resection where possible, followed by radiotherapy. Surgery may achieve either complete resection or partial resection of the tumour. Radiotherapy has been demonstrated to prolong survival and is usually recommended after surgery. Adjuvant chemotherapy is not considered part of standard therapy in the UK, but is used more routinely in the USA. The most frequently used regimens are a combination of procarbazine, lomustine and vincristine (PCV therapy), or single-agent treatment with carmustine or lomustine.

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