How Parkinsons Disease Is Diagnosed
Diagnosing Parkinsons disease can be complicated because there isnt a specific blood test or screening test that can determine whether or not you have it.
Instead, Parkinsons is diagnosed clinically, which means a doctor will examine you, review your symptoms and medical history, and diagnose accordingly.
Parkinsons disease is a neurological condition that can make movement difficult. If your general practitioner thinks you might have Parkinsons, they may refer you to a neurologist who specializes in movement disorders for a diagnosis.
It can be challenging to catch Parkinsons in the early stages because the symptoms may be too mild to notice or meet the diagnostic criteria. Also, early Parkinsons symptoms are often mistaken for typical signs of aging.
The symptoms of Parkinsons disease are also similar to those of other health conditions, which may be misdiagnosed as Parkinsons at first. Your doctor may suggest specific tests and scans to help eliminate other conditions that can mimic the symptoms of Parkinsons disease.
Is There Anything I Can Do To Slow The Progression Of Parkinsons Symptoms
Treatment for Parkinsons can help you manage your symptoms. Currently, theres no way to cure or stop the progression of Parkinsons. However, medical professionals have found ways to slow the progression of symptoms with therapies such as medications and deep brain therapy.
Diet and exercise are also known to slow down Parkinsons. Studies have shown that eating a nutritious diet, such as the Mediterranean diet, can help slow down the progression of Parkinsons disease.
Additionally, getting regular exercise has been shown to slow down symptom progression. People with Parkinsons should try to get at least 2.5 hours of exercise each week. A physical therapist or another medical professional can help you develop an exercise routine that meets your needs.
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What Is A Datscan
A DaTscan is an imaging drug, also called Ioflupane I 123 or phenyltropane, that acts as a radioactive tracer for dopamine transporters within the brain. This drug was approved by the FDA in 2011. It may help distinguish the diagnosis of essential tremor from Parkinson’s syndromes, like Parkinsons disease or Parkinsons disease dementia.
The drug is administered during the SPECT scan. This scanning technique gathers images of a particular area in the brain called the striatum, a cluster of neurons in the subcortical basal ganglia of the forebrain. The striatum helps facilitate the transportation of dopamine.
DaTscan is injected into the patients bloodstream and eventually circulates to the brain. The tracer attaches itself to a molecule found on dopamine neurons in the striatum called the dopamine transporter . The patient then undergoes a SPECT scan which will produce an image of the dopaminergic neuron terminals that remain available in the striatum.
In patients with a diagnosis of Parkinsons disease, or parkinsonism , this area of the brain will show dark. This indicates the loss of dopamine-containing nerve cells within the brain, a hallmark of the disease.
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How Is Parkinsons Diagnosed
Doctors use your medical history and physical examination to diagnose Parkinson’s disease . No blood test, brain scan or other test can be used to make a definitive diagnosis of PD.
Researchers believe that in most people, Parkinson’s is caused by a combination of environmental and genetic factors. Certain environmental exposures, such as pesticides and head injury, are associated with an increased risk of PD. Still, most people have no clear exposure that doctors can point to as a straightforward cause. The same goes for genetics. Certain genetic mutations are linked to an increased risk of PD. But in the vast majority of people, Parkinsons is not directly related to a single genetic mutation. Learning more about the genetics of Parkinsons is one of our best chances to understand more about the disease and discover how to slow or stop its progression.
Aging is the greatest risk factor for Parkinsons, and the average age at diagnosis is 60. Still, some people get PD at 40 or younger.
Men are diagnosed with Parkinsons at a higher rate than women and whites more than other races. Researchers are studying these disparities to understand more about the disease and health care access and to improve inclusivity across care and research.
Aging is the greatest risk factor for Parkinsons, and the average age at diagnosis is 60. Still, some people get PD at 40 or younger.
The Michael J. Fox Foundation has made finding a test for Parkinsons disease one of our top priorities.
How Is Parkinson’s Diagnosed
Current evidence suggests that Parkinsons tends to develop gradually. It may be many months, even years, before the symptoms become obvious enough for someone to go to the doctor.
This information looks at what parkinsonism is, how Parkinsons and other similar conditions may be diagnosed, and explains some of the tests that may be involved in the process.
Parkinsonism is a term used to describe symptoms or signs that are found in Parkinsons, but which can also be found in other conditions that cause slowness of movement, stiffness and tremor.
Most people with a form of parkinsonism have idiopathic Parkinsons disease, also known as Parkinsons. Idiopathic means the cause is unknown.
Other less common forms of parkinsonism include multiple system atrophy , progressive supranuclear palsy , drug-induced parkinsonism and vascular Parkinsons.
If youre concerned about symptoms youve been experiencing, you should visit your GP. If your GP suspects you have Parkinsons, clinical guidelines recommend they should refer you quickly to a specialist with experience in diagnosing the condition .
Its not always easy to diagnose the condition. So its important that you see a Parkinsons specialist to get an accurate diagnosis and to consider the best treatment options.
Diagnosing Parkinsons can take some time as there are other conditions, such as essential tremor , with similar symptoms. There is also currently no definitive test for diagnosing Parkinsons.
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How Do We Diagnose Pd
We look for certain cardinal or core features on the examination, plus a supportive history. For example, if a patient has recently been taking medications that can make someone look like they have PD, then the doctor would say, You look like you may have PD, but this medication youve been taking may be the cause, so Im not sure if you really have PD, or if the problems are entirely due to the medications. Parkinsons Disease is slow in onset, so if the patient said that she woke up one morning with tremors and a shuffling walk, but had been playing competitive tennis the evening before, wed think that she more likely had a brain infection or had taken a medication with bad side effects. The history generally is of slowly progressive changes, developing over months, of intermittent tremors, usually in the hands or jaw, slowing down in general, difficulty getting out of a car seat or low, soft sofa, softening of the voice, smallness and slowing of handwriting, change in posture and facial expression. Very often something is only noticed on a particular day, but friends and family will generally report that although they didnt notice particular changes, now that they know what to look for, the changes began months or even years before.
On examination we look for: tremor at rest, rigidity, slowness and loss of spontaneous movement, stooped posture and a characteristic way of walking.
Diagnosis Of Parkinsons Disease
There are currently no blood or laboratory tests to diagnose non-genetic cases of Parkinsons. Doctors usually diagnose the disease by taking a persons medical history and performing a neurological examination. If symptoms improve after starting to take medication, its another indicator that the person has Parkinsons.
A number of disorders can cause symptoms similar to those of Parkinsons disease. People with Parkinsons-like symptoms that result from other causes, such as multiple system atrophy and dementia with Lewy bodies, are sometimes said to have parkinsonism. While these disorders initially may be misdiagnosed as Parkinsons, certain medical tests, as well as response to drug treatment, may help to better evaluate the cause. Many other diseases have similar features but require different treatments, so it is important to get an accurate diagnosis as soon as possible.
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Discussing A New Diagnosis Of Parkinsons With Patients
In discussing a new diagnosis of Parkinsons with a patient, Dr. Hung said he makes sure patients understand that there are medications that can help with symptoms, and while we cant currently cure the disease, we will do our very best to keep them at a high quality of life for as long as possible. Dr. Hung refers his patients to a variety of online resources, including the Parkinsons Foundation, the Michael J Fox Foundation, and the American Parkinsons Disease Association.
In an initial visit, Dr. Hung also stresses the importance of exercise , and recommends early referral to physical therapists specializing in Parkinsons Disease. There is growing evidence that exercise not only helps with mobility / motor symptoms in Parkinsons, but may actually also have neuroprotective effects, and an ongoing trial is randomizing patients to moderate or vigorous exercise to investigate the impact on clinical disease progression and DaT scans.
Trying Parkinsons Disease Medications
One of the features of PD is that it will significantly and consistently improve when you begin taking medication that targets your dopamine system.10 Your doctor may ask you to try taking Parkinsons medication, like carbidopa-levodopa, to help confirm a PD diagnosis. Levodopa is a drug that is converted into dopamine in your brain, replacing some of the dopamine you lose due to the disease. Levodopa is frequently paired with carbidopa, which helps prevent levodopa from breaking down before it reaches your brain. Your doctor will observe if carbidopa-levodopa helps your motor symptoms. Carbidopa-levodopa is typically very effective at treating motor symptoms, so a significant response to the medication used to treat it helps confirm the diagnosis. Parkinsons medications are generally very safe and the risk of taking them is low, while the benefit is great because it might help if you do have Parkinsons and improve your mobility.10
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What Are The Risk Factors For Parkinsons
There are a few known risk factors for Parkinsons. These include:
- having a family history of Parkinsons
- being over 60 years
- having been exposed to herbicides, pesticides, and other toxins
Its important to note that these risk factors only cause a slight increase in risk. Having one or more risk factors isnt an indicator youll develop Parkinsons. However, if youre concerned about your risk for Parkinsons, talk with a doctor.
What Tests Will Be Done To Diagnose This Condition
When healthcare providers suspect Parkinsons disease or need to rule out other conditions, various imaging and diagnostic tests are possible. These include:
New lab tests are possible
Researchers have found possible ways to test for possible indicators or Parkinsons disease. Both of these new tests involve the alpha-synuclein protein but test for it in new, unusual ways. While these tests cant tell you what conditions you have because of misfolded alpha-synuclein proteins, that information can still help your provider make a diagnosis.
The two tests use the following methods.
- Spinal tap. One of these tests looks for misfolded alpha-synuclein proteins in cerebrospinal fluid, which is the fluid that surrounds your brain and spinal cord. This test involves a spinal tap , where a healthcare provider inserts a needle into your spinal canal to collect some cerebrospinal fluid for testing.
- Skin biopsy. Another possible test involves a biopsy of surface nerve tissue. A biopsy includes collecting a small sample of your skin, including the nerves in the skin. The samples come from a spot on your back and two spots on your leg. Analyzing the samples can help determine if your alpha-synuclein has a certain kind of malfunction that could increase the risk of developing Parkinsons disease.
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What Is Essential Tremor And How Is It Different To A Parkinsons Tremor
A tremor is a rhythmical, involuntary movement that affects a part of the body, such as the hand.
Essential tremor is the most common type of tremor. Its most noticeable when your hands are doing something and it usually affects both the right and left sides of the body equally. Essential tremors often lessen when your body is resting.
Unlike an essential tremor, a Parkinsons tremor is most obvious when the affected body part is resting and tends to be less noticeable with movement. It usually starts on one side of the body and may progress to the other side as Parkinsons develops.
The time it takes to get a diagnosis can vary from person to person. Some people may receive a diagnosis of Parkinsons quite quickly, but for others it may be a long process. This can be due to a number of things, including your medical history, your age and what symptoms you have.
Your specialist may wish to rule out other causes of your symptoms first and see how you respond to treatment. This may take some time, and, as already mentioned, there is currently no definitive test for Parkinsons.
How you respond to treatment may help your specialist make a diagnosis. Keeping a diary or record of your symptoms will give the specialist more information to guide their decision.
Because the symptoms of Parkinsons are sometimes similar to other forms of parkinsonism, people can sometimes be misdiagnosed.
Changes In Cognition And Parkinsons Disease
Some people with Parkinsons may experience changes in their cognitive function, including problems with memory, attention, and the ability to plan and accomplish tasks. Stress, depression, and some medications may also contribute to these changes in cognition.
Over time, as the disease progresses, some people may develop dementia and be diagnosed with Parkinsons dementia, a type of Lewy body dementia. People with Parkinsons dementia may have severe memory and thinking problems that affect daily living.
Talk with your doctor if you or a loved one is diagnosed with Parkinsons disease and is experiencing problems with thinking or memory.
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If Its Not Parkinsons Disease What Could It Be
Here are some possibilities:
Side effects of medication: Certain drugs used for mental illnesses like psychosis or major depression can bring on symptoms like the ones caused by Parkinsonâs disease. Anti-nausea drugs can, too, but they typically happen on both sides of your body at the same time. They usually go away a few weeks after you stop taking the medication.
Essential tremor: This is a common movement disorder that causes shaking, most often in your hands or arms. Itâs more noticeable when youâre using them, like when you eat or write. Tremors caused by Parkinsonâs disease usually happen when youâre not moving.
Progressive supranuclear palsy: People with this rare disease can have problems with balance, which may cause them to fall a lot. They donât tend to have tremors, but they do have blurry vision and issues with eye movement. These symptoms usually get worse faster than with Parkinson’s disease.
Normal pressure hydrocephalus : This happens when a certain kind of fluid builds up in your brain and causes pressure. People with NPH usually have trouble walking, a loss of bladder control, and dementia.
Determining Diagnosis Through Response To Parkinsons Medication
If a persons symptoms and neurologic examination are only suggestive of Parkinsons disease, the physician may prescribe a medication intended for Parkinsons disease to provide additional information. In the case of idiopathic Parkinsons, there is typically a positive, predictable response to Parkinsons disease medication. In the case of some related Parkinsonian syndromes, the response to medication may not be particularly robust, or it may be absent entirely.
Unfortunately, there are no standard biological tests for the disease, such as a blood test. However, researchers are actively trying to find biomarkers in blood and other bodily fluids that could help confirm the diagnosis.
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Conditions That May Be Mistaken For Parkinsons Disease
There are a few conditions that may be confused with Parkinsons disease. These conditions can cause similar symptoms, and because there is no definitive test that proves you have Parkinsons disease or any of these similar conditions. As you might imagine, this can make it challenging at times for doctors to figure out which condition you have. A few of the most common conditions that might look like Parkinsons are:
Looking For Signs Of Parkinsons
Your specialist will examine you to look for common signs of Parkinsons. You may be asked to:
- write or draw to see if your writing is small or gradually fades
- walk to see whether theres a reduction in the natural swing of your arm or in your stride length and speed
- speak to see if your voice is soft or lacks volume
The specialist will also look at and ask you about your:
- face to see if there is a masked look or if you have difficulty with facial expressions
- limbs to see if you have a tremor, any stiffness or slowness of movement
As well as examining you for any of the typical signs of Parkinsons, the specialist will also look for signs that may suggest a different diagnosis.
It may be helpful to take someone with you for support when seeing a specialist. Taking a list of questions you want to ask can also be useful so you dont forget to mention something you want to know about. If a healthcare professional says something you dont understand, dont be afraid to ask them to explain what they mean.
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