Do you have these rare tumors in your brain? Let's learn about Gangliocytoma and Pineocytoma!

Oh, sometimes we hear things like, 'brain tumor', 'I have a headache and I'll check it out'. It really makes my heart flutter when I hear something like that. But did you know, not all tumors that form in the brain are the same dangerous type of cancer. There are some tumors that grow slowly, are benign, that is, non-cancerous. Today we are going to talk about two such, somewhat rare, but worth knowing, types of brain tumors. These are gangliocytoma and pineocytoma.

What are Gangliocytoma and Pineocytoma?

Simply put, these are both very rare, non-dangerous (i.e. non-cancerous - `benign`) types of brain tumors.

Gangliocytoma is a type of tumor that affects parts of your central nervous system (also known as the CNS).

The other type, a pineocytoma, develops in the pineal gland, a small gland located deep inside your brain. The pineal gland is the gland that helps control our sleep. Imagine, this little gland is very important for things like falling asleep at night and waking up in the morning.

Both types of tumors grow slowly . That's why it sometimes takes a while for symptoms to appear. Doctors usually treat them with surgery and sometimes radiation therapy.

Who is more likely to develop these types of brain tumors?

In fact, a type of tumor called gangliocytoma can develop in people of any age. This means that even a small child or an elderly person can be at risk. However, it is most often seen in young people between the ages of 10 and 30 .

Pineocytoma tumors usually affect adults, meaning people between the ages of 20 and 64. The average age of diagnosis is about 38 years.

In which parts of our central nervous system (CNS) do gangliocytoma tumors develop?

Gangliocytomas most often develop in the parts of your brain called the temporal lobes . These are located behind your ears. These temporal lobes help control things like your memory, hearing, and emotions. Imagine, you remember an old event, listen to a song and enjoy it, and feel happy or sad because of the activity of these parts.

Not only that, this tumor can also develop in the following places on your body:

• Brainstem: This is the bridge-like part of your brain that connects the top part of your brain (cerebrum), spinal cord, and cerebellum. It sends signals that control vital functions like your breathing and heart rate.
• Cerebellum: This part of your brain, located at the back of your brain, controls your balance, movement, and vision. Think about it, this is what keeps you upright when you walk, keeps you from falling, and helps you reach out to catch a ball.
• Floor of the third ventricle: This is a narrow cavity at the front of the brain. It protects the brain from injury and helps move nutrients and waste products around.
• Spinal cord: This is the main pathway that carries nerve signals from your brain to your body and from your body to your brain. These nerve signals are what make you feel things (heat, cold, pain) and move your body.

What is the difference between a pineal cyst and a pineocytoma?

This is also something that can confuse many people. Think about it, a pineal cyst is a sac filled with fluid or air . It's like a water blister. These are often found incidentally during a scan. However, a pineocytoma is a tumor that is formed by a large collection of abnormal cells .

Pineal cysts usually don't get bigger, meaning they rarely change in size. Pineocytomas, however, grow slowly. However, both are benign (non-cancerous) conditions. This means they are not cancerous.

What are the symptoms caused by these conditions?

Most of the time, you may not have any symptoms even if you have a gangliocytoma. Sometimes, doctors find these tumors incidentally when they are doing imaging tests (such as an MRI or CT scan) for another problem.

However, both types of tumors, gangliocytoma and pineocytoma, can cause certain conditions with different symptoms.

Common symptoms of Gangliocytoma

This tumor can cause you to experience symptoms like:

• Changes in movement: Like a loss of muscle control. For example, tremors, paralysis, weakness. Imagine, you suddenly find it difficult to hold a cup, or your legs feel like they are tripping when you walk.
• Changes in sensation: A feeling of numbness in some areas, like a tingling sensation in a leg.
• Speech difficulties: Slurred speech, almost like you can't speak. You can't say what you want to say clearly.
• Vision changes: Vision may become blurry, appear as if you are seeing in two parts, and sometimes it may feel like you are losing part of your vision.

Can Gangliocytoma cause serious medical conditions?

Yes, this tumor can cause some serious medical conditions. For example:

• Endocrine system disorders: These are conditions that occur when the amount of hormones produced by the glands in your body is too high or too low. This can disrupt many of the body's functions.
• Seizures: You may have heard of this, a sudden loss of consciousness and convulsions. These tumors can cause this condition by stimulating the brain.
• Increased pressure inside the brain: This can cause headaches, nausea, vomiting, and confusion. It can feel like your head is being squeezed from the inside.
• Lhermitte-Duclos disease (LDD): This is a very rare, harmless tumor. It develops in your cerebellum. It is sometimes called dysplastic gangliocytoma of the cerebellum. A person with LDD may have headaches, nausea, fluid in the brain (hydrocephalus), difficulty walking and losing balance (ataxia), and vision problems. People with LDD may also have a genetic condition called Cowden syndrome, which causes skin tumors and an increased risk of cancer.

Common symptoms of Pineocytoma

Pineocytoma can cause fluid to build up inside your brain, causing increased pressure. This is called hydrocephalus . If you have hydrocephalus, you may experience symptoms such as:

• Balance problems: Losing balance while walking, feeling like you're going to fall.
• Eye movement problems (`Parinaud syndrome`): Difficulty looking up, especially when looking straight ahead. You may not be able to move both eyes at the same time.
• Headache: You may experience a severe, persistent headache. Sometimes this pain is worse when you wake up in the morning.
• Memory problems: Forgetting things, having difficulty remembering new things.
• Nausea and vomiting: This may be worse, especially in the morning.
• Sleep disorders: Not being able to fall asleep, or sleeping too much. This is because the pineal gland is involved in sleep.
• Difficulty walking: It feels like you can't walk, your legs are wobbling.

What is the real cause of these brain tumors?

Like most other tumors, gangliocytomas and pineocytomas develop when there is a change in the genetic instructions of our cells. Think of it this way: the cells in our body are like little factories. They receive instructions to work. When these instructions change, the cells start dividing uncontrollably. That's when they form a tumor.

However, researchers still don't know exactly what the exact ``trigger'' is that causes these changes. That is, there is no clear answer to why these cells suddenly start behaving this way.

However, they have discovered that Cowden syndrome, which is associated with Lhermitte-Duclos disease, is caused by a mutation in a gene called PTEN. This PTEN gene makes a protein that helps control how cells grow and divide. So, when the PTEN gene is mutated, the production of that protein stops, and cells start to grow uncontrollably.

How do doctors diagnose these tumors? (Diagnosis)

If you have these symptoms, a doctor will first ask you about your symptoms and whether anyone in your family has had these conditions (`family health history`). Then, they will examine you. They will do a `neurologic exam`, specifically a test of your nervous system . This will look for the following:

• The way your eyes and mouth move.
• Muscle strength.
• Reflexes (such as whether the leg will jump when hit on the knee with a small hammer)

In addition, the doctor may also perform these tests:

• Magnetic Resonance Imaging (MRI): This is a painless test. It uses a large magnet, radio waves, and a computer to make very clear pictures of the organs and structures inside your body. It is used to see if there are any tumors, how big they are, and where they are.
• CT (computed tomography) scan: This uses a series of X-rays and a computer to create three-dimensional images of your soft tissues and bones. Like MRI, it is used to find and examine tumors.
• Blood test: This can be done to see if you have abnormal levels of melatonin in your blood (especially in cases of pineocytoma, as it is related to the pineal gland).
• Spinal tap (lumbar puncture): This involves taking a sample of the cerebrospinal fluid (CSF) that surrounds your brain and spinal cord and checking it for tumor cells.
• Biopsy: This involves taking a small sample of cells from the tumor and testing them in a lab to determine exactly what type of tumor it is. Doctors often use minimally invasive techniques such as endoscopy or stereotactic needle biopsy.

How is Gangliocytoma treated?

Imagine you have a gangliocytoma, but you don't have any symptoms. At that point, your doctor will tell you, "Let's watch it." That is, he will tell you to come in for regular check-ups to see if you have any new symptoms, or if the tumor has changed or gotten bigger. He may also do things like imaging tests and blood tests.

However, if you need treatment, doctors usually perform brain surgery to remove the tumor . The good news is that gangliocytomas are very unlikely to come back after being removed this way.

How is Pineocytoma treated?

In some cases of pineocytoma, doctors may perform brain surgery to remove all or part of the tumor. They may also use a treatment called radiation therapy .

During surgery, if you have hydrocephalus (a condition where the brain is filled with fluid and has increased pressure), doctors may insert a small plastic tube called a shunt into your brain. This shunt removes the extra cerebrospinal fluid from your brain, reducing the pressure inside your head. This can greatly reduce your symptoms.

Is there a way we can prevent these brain tumors from forming?

Well, there's really nothing you can do to prevent these tumors from forming . As mentioned earlier, they form when cells mutate and start dividing uncontrollably. Unless it's related to Cowden syndrome, researchers still don't know exactly what causes this mutation. Cowden syndrome is caused by a change in a gene that controls cell growth. So, this is not something we can control.

What happens if you have a tumor like this? What can you expect?

In most cases, after surgery to remove this tumor, the chance of it coming back is very low . That's really comforting, isn't it? That means you can pretty much live a normal life after treatment. However, as the doctor says, it's a must to go for `follow-up` check-ups.

When should I see a doctor?

Depending on your condition, your doctor may schedule regular follow-up appointments to monitor your overall health. If you had surgery to remove a tumor, they may also recommend imaging tests to check if the tumor has come back or if a new tumor has formed.

The most important thing is to see a doctor at any time if you experience symptoms of a previous tumor, or if you notice any new, suspicious changes in your body . Don't put it off, okay? Because the sooner you recognize the condition, the easier it is to treat.

The most important things to remember from what we have discussed (Take-Home Message)

Gangliocytoma and pineocytoma are two very rare, slow-growing, benign brain tumors that develop in your central nervous system (CNS) and pineal gland.

Although these are not cancerous, they can cause a variety of medical conditions that can affect your life. Depending on the type of tumor you have, doctors may treat it with either surgery or radiation therapy. These tumors are very unlikely to come back after being removed with surgery.

If you have a benign tumor like this, talk to your doctor about your treatment options, what to expect after treatment, and what you need to know about living with this type of tumor. Don't hold anything back, listen to everything . It will give you strength. Don't be afraid, the most important thing is to be aware of these things and follow your doctor's instructions.

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