Do you sometimes think, "Oh, I forgot this too!"? Forgetting small things and sometimes getting confused can be normal. However, things like gradual memory loss and changes in behavior can also be symptoms of a serious illness. Today we are going to talk about a rare, but very serious, disease that affects the brain. That is Creutzfeldt-Jakob disease, or CJD as we call it for short.
What is CJD? Simply put...
Think about it, our brain is a very complex machine. For this machine to work properly, its tiny parts, called cells, need to be healthy. CJD is a rare, serious disease that gradually destroys our brain cells. The main cause of this is an abnormal type of protein called ``prions`` .
Now you might be wondering what these 'prions' are. In our body, especially in the brain, there are things called proteins. These are like little machines, they have a specific shape, and only if they are in that shape can they do their job properly. Think of it like origami. If you fold it correctly, you can make a beautiful animal or flower. But if you fold it incorrectly? It doesn't work. That's how these proteins are. Sometimes these proteins fold incorrectly. We call such misfolded proteins 'prions'.
These misfolded 'prions' start to accumulate inside brain cells. They accumulate and destroy those cells. It's like a pile of garbage that accumulates every day. This is why CJD patients develop symptoms of dementia , such as memory loss and confusion. They can also experience behavioral changes and difficulty walking.
The most important thing is that CJD is always fatal. There is no cure yet, and there is no way to slow the progression of the disease. However, there are treatments and care that can help the patient live more comfortably and reduce pain.
This is a very rare disease. Worldwide, the disease occurs in about one to two people in a million each year. Even in a country like the United States, only about 350 cases of CJD are reported each year.
There is one variant of this called ``variant CJD`` (or ``vCJD``) . It is also very rare. It is caused by eating beef that has the disease ``bovine spongiform encephalopathy`` (BSE), which is a disease that affects cattle.
What are the symptoms of CJD? Let's look at it from the beginning.
The symptoms of CJD usually appear gradually. However, as the disease progresses, these symptoms can increase rapidly. Let's take a look at the main symptoms, from the early stages of the disease to the late stages:
- Forgetfulness and memory problems: It starts with forgetting small things. Things like a friend's name, a street, or the work you were doing. This gradually gets worse.
- Confusion and disorientation: You can't remember where you are, what time it is, or who is around.
- Changes in behavior and personality: You may not be the same person you used to be. You may become angry easily, feel sad, or lose all emotion.
- Vision problems, difficulty understanding what you see: Your eyesight becomes weak, and you cannot recognize what you see.
- Hallucinations or delusions: Seeing or hearing things that are not there, or having false beliefs that someone is trying to harm you.
- Problems with coordination (ataxia): You may not be able to walk properly, have difficulty controlling your limbs, and may sway like a drunk person.
- Problems with body balance: Falling while standing or walking.
- Uncontrolled muscle contractions (`myoclonus`) and muscle stiffness (`dystonia`): Sudden jerking of an arm or leg, or a feeling of tightness in the muscles of the body.
- Seizures: Can come on like a fit.
- Paralysis: Parts of the body become paralyzed.
- Muscle atrophy: The body's muscle mass is lost.
These symptoms may appear one by one, or several may occur together. The most important thing is to see a doctor as soon as possible if you have any of these symptoms.
What causes CJD? Let's remember those 'prions' again
As we've discussed before, the main cause of CJD is misfolded proteins called ``prions.'' The most dangerous thing about these ``prions'' is that they can misfold even normal, healthy proteins. Just like one bad apple can make all the other apples go bad.
Brain cells cannot get rid of these misfolded 'prions'. So they accumulate, eventually destroying brain cells. As these 'prions' spread throughout the brain, the disease progresses very rapidly.
Are there different types of CJD?
Yes, there are several main types of CJD:
- Sporadic CJD: This is the most common type of CJD. The exact cause is still unknown. It occurs suddenly, without any obvious cause.
- Genetic CJD: This is inherited. It is caused by a defective gene inherited from one or both parents. There are two subtypes of this: Gerstmann-Sträussler-Scheinker (GSS) syndrome and fatal familial insomnia . These are a bit tricky, but they are very specific conditions.
- Acquired CJD: This is caused by an external cause. For example, it can be caused by an organ transplant from someone with CJD, a tissue transplant, or by using contaminated surgical equipment. However, this is very rare. Nowadays, there is a lot of concern about this.
- Variant CJD (vCJD): We've talked about this before. It's caused by eating beef that has been infected with mad cow disease (BSE). The prions that cause BSE can infect humans as well as other animals.
Who is at higher risk of developing CJD?
Anyone can get CJD. Sometimes, the 'prions' in your body can be present for years without showing any symptoms. But once symptoms do appear, the disease can quickly become severe as the brain is damaged.
This disease usually affects people between the ages of 50 and 80. However, the genetic CJD type can usually appear between the ages of 30 and 50.
Is CJD a contagious disease?
This is a problem for many people. CJD is not spread through casual contact, such as shaking hands, talking, or eating together. The only way that CJD can be spread from one person to another is through a transplant of an organ or tissue from someone who has CJD, or through the use of certain hormones from someone who has had it.
They say that the type called `vCJD` can be transmitted through blood transfusions, but that is very, very rare. The disease called `vCJD` itself is very rare.
How do doctors diagnose CJD?
A doctor diagnoses CJD by carefully examining your symptoms and signs. In addition to a physical exam, they will also do a neurological exam. They will ask you to do some simple tasks to try to identify problems with your brain function.
Specialists classify CJD as a 'transmissible spongiform encephalopathy' . While this name may sound a bit complicated, it refers to the way a brain damaged by 'prions' looks under a microscope. That is, it looks like a sponge with bumps.
To confirm a diagnosis of CJD, tests such as an MRI scan or a spinal tap (lumbar puncture) are performed.
In addition, doctors may use tests such as these to rule out other conditions that have similar symptoms to CJD and to further investigate CJD:
- Blood tests
- Genetic testing - especially to see if a type is hereditary
- An electroencephalogram (EEG)
- Urinalysis
- Brain biopsy - This is done very rarely, only if all other tests fail to provide a definitive diagnosis.
Is there a treatment for CJD?
Unfortunately, there is no cure for CJD, no treatment to control the spread of the disease, or no treatment to slow its progression. The only thing doctors can do is help reduce the discomfort caused by the symptoms. This is called palliative care .
For example, medications can be given to treat seizures, behavioral changes, or uncontrollable muscle twitching. However, the benefits of these treatments are limited.
This condition can get worse very quickly. Therefore, supportive care options for you and your loved ones are very important. In the final stages of the disease, hospice services can be very helpful.
Sometimes, if you qualify, your medical team may suggest that you participate in a clinical trial that is researching new treatments.
What kind of future can someone with CJD expect?
Because CJD is incurable and has no cure, the outlook for a person with the disease is very bleak. Once symptoms begin, it is not long before the ability to function independently, move around, and speak is lost.
Because changes can happen so quickly, it's important to work with your medical team to plan ahead to ensure your wishes and needs are met. In fact, regardless of whether you have a medical condition or not, it's a good idea for everyone to have an `advance directive` . This means that you have written down in advance what medical care you want if you become unable to communicate your wishes. It's especially important to have this plan in place early on in a rapidly spreading disease like CJD.
Given how serious this condition is, it is a good idea to seek advice from a mental health professional to help you and your family cope with these changes and stay mentally strong.
What is the life expectancy of a CJD patient?
Most CJD patients die within a few months or a year of diagnosis. The only exception is the genetic form of CJD, in which people can live from one to ten years after the onset of symptoms.
Your doctor can give you specific, up-to-date information about your condition. Remember, statistics don't affect everyone the same.
Can CJD be prevented?
Most types of CJD cannot be prevented. The only exception is the type called `vCJD`. It comes from eating beef infected with `BSE` (mad cow disease).
Animal testing helps prevent BSE-infected cattle from entering the food supply chain. However, untested and improperly prepared meat can still pose a risk. To be safe, avoid eating untested and unregulated meat, especially brain parts or bone marrow.
Finally, things to remember
A CJD diagnosis is a life-changing experience. It can feel like you and the world around you are gone in the blink of an eye. Such a change can be very difficult for you and your loved ones to cope with.
If you're unsure of what to expect or how to cope, your medical team is here to help. They can help you plan ahead and prepare for what's to come. Remember, you're not alone.
` CJD, Creutzfeldt-Jakob Disease, prion, brain disease, neurological disease, memory loss, dementia, mad cow disease
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