Have you ever heard of someone with cancer experiencing symptoms that are not due to the cancer itself, but are caused by other diseases? It's like the cancer is in one part of the body, but its effects are spreading to other parts. That's what we call (Paraneoplastic Syndromes) . This may sound a bit complicated, but let's talk about what's going on. Don't be afraid, it's very important to be aware of this.
What is a paraneoplastic syndrome?
Simply put, when you have cancer, we call it a Paraneoplastic Syndrome , which is when other symptoms appear in the body without being directly caused by the cancer cells. Imagine, there is a cancer in the body, but some hormones or proteins secreted by it cause a certain system in the body to start working differently. Or, sometimes our immune system , while trying to destroy cancer cells, mistakenly attacks good cells as well. We call this an autoimmune response . These symptoms can also occur in such cases.
Paraneoplastic syndromes can affect many different systems in the body. For example, your nervous system , endocrine system (the system that makes hormones), kidneys , bones , joints , skin, and blood can all be affected.
Often, the symptoms of one of these (Paraneoplastic Syndromes) are the first signs of cancer. Therefore, it is very important to be aware of this.
Who is most likely to be affected by this condition? (Who is affected by paraneoplastic syndromes?)
Paraneoplastic syndromes are more common in middle-aged and older people, especially those with conditions such as lung cancer , lymphatic cancer , ovarian cancer , or breast cancer . The same factors that cause cancer can also cause these syndromes.
How common are these? (How common are paraneoplastic syndromes?)
Paraneoplastic Syndromes occur in between 8% and 20% of people with cancer. This means that not all cancer patients develop them, but they can affect a significant number.
What cancers are associated with paraneoplastic syndromes?
Although anyone with a cancerous tumor can develop a paraneoplastic syndrome , there are several types of cancer that are most commonly associated with these conditions:
- Breast cancer
- Stomach cancer
- Leukemia
- Lymphoma
- Lung cancer (especially small-cell lung cancer)
- Ovarian cancer
- Pancreatic cancer
- Prostate cancer
- Kidney cancer
- Testicular cancer
What causes paraneoplastic syndromes?
We have already discussed that there are two main reasons for this.
1. Substances secreted by cancer cells: Some cancers secrete hormones and proteins . These substances cause some organs in the body to function abnormally. If left untreated, this can even cause permanent damage.
2. Immune system malfunction: Our body's immune system is there to protect us from diseases. This system produces substances called antibodies . These antibodies recognize and destroy abnormal cells, such as cancer cells. But sometimes, these signals get mixed up and the antibodies start attacking healthy cells as well. That's when the symptoms of a (Paraneoplastic Syndrome) appear.
What are the symptoms of paraneoplastic syndromes?
The symptoms that appear in this can vary from person to person. It depends on which system of the body is affected. Surprisingly, in more than 60% of cases, the symptoms of this syndrome appear before the cancer is even diagnosed. Therefore, if these symptoms are recognized early, the cancer can be detected and treated at an early stage. Then the chances of success of the treatment are higher.
Common symptoms
These are some of the most common symptoms:
- Fever
- Loss of appetite and weight loss
- Night sweats
When the nervous system is affected
If your central nervous system (that is, your brain and spinal cord) and peripheral nervous system (the nerves that exit the brain and spinal cord) are affected, you may experience symptoms like:
- Dizziness
- Double vision
- Speech difficulty
- Memory loss
- Epileptic conditions ( seizures )
- Muscle weakness
- Reduced reflexes, sensation or coordination
- Loss of feeling in your arms and legs
Imagine, someone has lung cancer, but they suddenly start to lose their memory, slur their words when they speak, and have difficulty keeping their balance when they walk. That's when doctors suspect that this is a (Paraneoplastic Syndrome) .
When the endocrine system is affected
If your hormonal system is affected, you may experience symptoms like:
- Extreme fatigue
- High blood pressure
- Muscle weakness
- Nausea and vomiting
- Sudden weight gain without any reason
When joints, bones and muscles are affected (Joints, bones and muscles - rheumatologic)
If these systems are affected:
- Conditions such as arthritis
- Joint pain, swelling or stiffness
When it affects the skin (Skin)
Sometimes the skin can also be affected:
- Itching
- Flushing
- Thickened skin
- Benign (noncancerous) skin growths
What are the types of paraneoplastic syndromes?
There are several types of Paraneoplastic Syndromes . They are classified according to the way they affect each system.
Nervous system paraneoplastic syndromes
Some examples:
- `(Cerebellar degeneration)`: This is damage to the cerebellum, affecting things like balance and walking.
- Dysautonomia: Affects the functioning of the autonomic nervous system.
- Encephalitis: Inflammation of the brain.
- Encephalomyelitis: Inflammation of the brain and spinal cord.
- Lambert-Eaton myasthenic syndrome (LEMS): Causes muscle weakness.
- Myasthenia gravis (MG): This is another condition that causes muscle weakness.
- Myelopathy: Diseases affecting the spinal cord.
- Neuromyotonia: Constant muscle activity.
- Opsoclonus-myoclonus syndrome: Abnormal movements of the eyes and muscles.
- `(Neuropathy (peripheral neuropathy))`: Damage to the peripheral nerves.
- `(Stiff-person syndrome)`: Muscle stiffness and painful contractions.
Endocrine system paraneoplastic syndromes
Examples:
- `(Cushing's syndrome): A condition caused by an increase in the hormone cortisol.
- Hypercalcemia: Increased calcium levels in the blood.
- `(Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH))`: A condition that causes increased water retention in the body.
Rheumatic paraneoplastic syndromes
(affects joints, bones, muscles and connective tissue)
Examples:
- `(Eosinophilic fasciitis)`
- `(Erythromelalgia)`
- `(Hypertrophic osteoarthropathy)`
- `(Palmar fasciitis)`
- `(Paraneoplastic polyarthritis)`
Blood paraneoplastic syndromes
Examples:
- `(Paraneoplastic erythrocytosis)`: Increased red blood cells.
- `(Paraneoplastic thrombocytosis)`: Increased blood platelets.
Skin paraneoplastic syndromes
Examples:
- Acanthosis nigricans: Dark, thickened patches on the skin.
- Dermatomyositis: Inflammation of the skin and muscles.
- Leukocytoclastic vasculitis: Inflammation of small blood vessels.
- `(Paraneoplastic pemphigus)`: A condition that causes blistering of the skin.
- `(Sweet syndrome)`: Fever and painful skin lesions.
Kidney paraneoplastic syndromes
Paraneoplastic glomerulonephritis is a syndrome that affects the kidneys.
How are paraneoplastic syndromes diagnosed?
Your doctor will diagnose this condition by asking you about your medical history, performing a physical examination, and performing several other tests.
- Neurological exam: Because this syndrome often affects the nervous system, your doctor will ask you to do certain things to check how your brain and muscles are functioning. They will check for changes in your strength, memory, and coordination.
- Imaging tests: Tests such as CT scans , MRIs , and ultrasounds may be used to see if there is a tumor causing the symptoms.
- Blood tests: Blood tests can reveal things that might raise suspicions about cancer. They can also check for antibodies related to paraneoplastic syndromes . These tests can also determine whether the symptoms are caused by other causes, such as infections or hormonal imbalances.
- Spinal tap / lumbar puncture: In some cases, your cerebrospinal fluid (CSF) is tested to see if there are antibodies that attack healthy cells. This involves inserting a small needle into your lower back and taking a sample of the fluid. It is then examined.
How are these conditions managed or treated? (How are paraneoplastic syndromes managed or treated?)
The most important thing is to treat the underlying cancer that is causing your symptoms. At the same time, you also manage your symptoms to reduce damage to your body's organs or systems.
Some of the treatments used to manage Paraneoplastic Syndromes :
- Corticosteroids: Medications such as cortisone or prednisone. These work by reducing inflammation (swelling) in the body.
- Immunosuppression: Medications that reduce the response of your body's immune system. Your doctor will prescribe medications based on the type of paraneoplastic syndrome you have.
- Intravenous immunoglobulin (IVIG): This treatment works by destroying harmful antibodies. In this, healthy antibodies are given as an injection, which destroy the harmful antibodies.
- Plasmapheresis: This involves removing plasma (the liquid part of the blood) from the blood to reduce the amount of antibodies, which are present in this plasma and can damage healthy tissue.
- Physical and speech therapy: This involves muscle exercises to improve activities such as speaking and moving. You may need this treatment if you have a paraneoplastic syndrome related to the nervous system.
What can I expect if I have a paraneoplastic syndrome?
Your prognosis depends largely on the stage of your cancer. In some cases, the symptoms caused by this syndrome may be mild and temporary. In other cases, the symptoms may be severe and require long-term management.
Talk to your doctor about how the stage of your cancer and your response to treatment will affect your recovery.
What complications are associated with paraneoplastic syndromes?
This can lead to a variety of complications. Some may be minor, while others can be serious and even life-threatening if left untreated. Your doctor will explain the possible complications and treatment options to you.
When should I call the doctor regarding paraneoplastic syndromes?
If you develop symptoms of a paraneoplastic syndrome for no apparent reason, see a doctor. Especially if you have been treated for cancer within the past five years and are experiencing these symptoms, it is a good idea to get tested again. This will also help your doctor determine if the cancer has come back.
What questions should I ask my doctor?
Some questions you can ask your doctor:
- What is the cause of my symptoms?
- How does my (Paraneoplastic Syndrome) affect my cancer treatment plan?
- What treatment options do I have?
- How does my (Paraneoplastic Syndrome) affect my chances of recovery?
- Will my symptoms improve after cancer treatment?
- How to manage symptoms in the short term? How to manage symptoms in the long term?
Finally, take-home message
Cancerous tumors can cause unexpected changes in the body. Sometimes, they can also include symptoms of a paraneoplastic syndrome . Because there are several types of these syndromes and the symptoms are varied, it may take a while for your doctor to recognize that your symptoms are related to cancer. However, once the diagnosis is confirmed, he or she can treat the symptoms and, most importantly, treat the underlying cancer .
The best way to manage a Paraneoplastic Syndrome is to get the most effective treatment for the cancer. So, don't ignore any symptoms. If you have any doubts, see a doctor as soon as possible. Only then can we all stay healthy.
` Paraneoplastic syndromes, cancer, symptoms, nervous system, endocrine system, immune system, cancer treatment
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