What is Myelodysplastic Syndrome? Early Signs, Risk Factors, and Treatment Explained

Myelodysplastic syndrome (MDS) is a group of rare disorders that affect the blood- forming cells in the bone marrow. Unlike many other cancers, it is not a single disease but a collection of conditions that can vary in severity and outcome.

This guide provides clear and reliable information about MDS—its symptoms, how it is diagnosed, available treatment options, and what patients and families can expect during the journey. The goal is to help you understand the condition better and feel more prepared to navigate the path ahead.

What Is Myelodysplastic Syndrome (MDS)?

Myelodysplastic syndrome (MDS) is a disorder of the bone marrow in which blood- forming cells do not develop properly. Because of this, the blood may have fewer healthy red cells, white cells, or platelets. In some people, MDS can slowly progress, while in others it may develop into a more aggressive blood cancer called acute myeloid leukemia (AML).

This ineffective production of blood cells in the bone marrow leads to a shortage of one or more types of healthy blood cells, a condition known as cytopenia. This can result in anemia (low red blood cells), neutropenia (low white blood cells), or thrombocytopenia (low platelets). Because the bone marrow is often active and trying to produce cells, a diagnosis of MDS can feel contradictory, as your body is making many cells, but they are of poor quality and don’t work correctly.

MDS is often referred to as a “pre-leukemia” because, for some patients, it can progress to a more serious and fast-growing blood cancer called acute myeloid leukemia (AML). However, for many patients, MDS remains a slow-growing disease that is managed over a long period. Early and accurate diagnosis is crucial for determining the right treatment plan and predicting the long-term outlook.

Types of Myelodysplastic Syndrome (MDS)

MDS is a diverse group of conditions that are classified based on the types of blood cells that are abnormal and the percentage of immature cells (blasts) in the bone marrow.

The World Health Organization (WHO) and other international consensus groups have a detailed classification system for MDS, which includes:

• MDS with single lineage dysplasia: This is the least aggressive type, where only one type of blood cell (e.g., red blood cells) is abnormal.
• MDS with ring sideroblasts (MDS-RS): This type is characterized by abnormal red blood cell precursors in the bone marrow that have iron rings around the nucleus.
• MDS with multi-lineage dysplasia: This type is more advanced than MDS with single lineage dysplasia, with abnormalities in two or three types of blood cells.
• MDS with excess blasts (MDS-EB): In this type, there is an increased percentage of blasts (immature blood cells) in the bone marrow and blood. This type is more likely to progress to AML.
• MDS with isolated del(5q): This is a specific subtype that is defined by a genetic change on chromosome 5. Patients with this subtype often respond very well to a specific targeted therapy.
• MDS, unclassifiable: This is a category for patients whose test results do not fit any of the other types.

What Are the Causes and Risk Factors for Myelodysplastic Syndrome (MDS)?

The exact cause of MDS is unknown in most cases. It is not contagious and is not directly caused by lifestyle factors. However, scientists have identified specific genetic mutations that are the underlying cause of most MDS cases. These mutations are not inherited; they occur during a person’s lifetime.

Key Risk Factors:

• Age: The risk of developing MDS increases significantly with age. The typical age of diagnosis is around 75 years old.
• Previous Cancer Treatment: People who have been treated for another cancer with certain chemotherapy drugs (such as alkylating agents) or high-dose radiation are at a higher risk of developing MDS years later. This is known as secondary or therapy-related MDS and often has a worse prognosis.
• Chemical Exposure: Long-term, high-level exposure to industrial chemicals like benzene is a known risk factor for MDS. Benzene is found in gasoline, tobacco smoke, and some plastics.
• Smoking: Tobacco smoke contains benzene, making smoking a significant risk factor for MDS.
• Genetic Syndromes: A small number of people are born with certain rare genetic conditions that increase their risk of developing MDS, such as Fanconi anemia.
• Other Blood Conditions: Sometimes, healthy people may have small changes in their blood-forming cells (called clonal hematopoiesis). Most people with these changes never get sick, but in a few, it may develop into conditions like MDS.

What Are the Symptoms of Myelodysplastic Syndrome (MDS)?

One of the most unique aspects of MDS is that many people do not have any symptoms in the early stages. The disease is often discovered by chance during a routine blood test for an unrelated condition. When symptoms do appear, they can be vague and are often a result of the shortage of healthy blood cells.

Common Early Signs:

• Fatigue and Weakness: The most common symptom, caused by anemia (a low red blood cell count). You may feel tired, weak, and short of breath after minimal exertion.
• Frequent Infections: A shortage of healthy white blood cells makes it difficult for your body to fight off infections. You may have frequent fevers or illnesses that are hard to get rid of.
• Easy Bruising or Bleeding: This is caused by a low platelet count. You may notice unexplained bruises, frequent nosebleeds, or bleeding from the gums.
• Pale Skin (Pallor): A lack of red blood cells can make your skin look pale or “washed out.”

Advanced Symptoms:

• A Rash: A rash that looks like small bruises or bleeding under the skin.
• Fever and Night Sweats: A persistent, unexplained fever and drenching night sweats.
• Pain or a Feeling of Fullness in the Abdomen: This can be caused by an enlarged spleen, which can be common in some types of MDS.

If you have any of these persistent symptoms, it is important to see a doctor for a proper evaluation. Early diagnosis, even after years of symptoms, is crucial.

How Is Myelodysplastic Syndrome (MDS) Diagnosed?

A diagnosis of MDS requires a series of tests to confirm the presence of cancer, determine its specific type, and assess its impact on the body.

Diagnostic Steps and Tests:

1. Physical Exam and Blood Tests: The diagnosis often begins with a physical exam and a complete blood count (CBC). A CBC can show abnormal levels of red blood cells, white blood cells, or platelets. A doctor may also look at a blood smear under a microscope to check for abnormal cells.

2. Bone Marrow Aspiration and Biopsy: This is the most definitive test. A small sample of both liquid and solid bone marrow is removed, typically from the hip bone, and sent to a lab for examination. This test helps doctors confirm the diagnosis, determine the percentage of blasts, and look for signs of scarring (fibrosis) in the bone marrow.

3. Cytogenetic and Molecular Tests: These specialized tests are performed on the bone marrow to look for specific changes in the chromosomes or genes of the blood-forming cells. These tests are crucial for guiding treatment, especially with targeted therapies, and for predicting the disease’s behavior. Doctors will look for features like a deletion in the TP53 or chromosome 5q genes.

4. Imaging Tests: Imaging scans, such as a CT scan or an ultrasound of the abdomen, may be used to check for an enlarged spleen or liver.

Staging and Grading of Myelodysplastic Syndrome (MDS)

MDS is not staged in the same way as solid tumors (like breast or lung cancer). Because it is a blood cancer, it is already “systemic” (throughout the body) at the time of diagnosis. Instead of a numbered staging system, doctors use a risk scoring system to predict the disease’s behavior and the patient’s prognosis.

Risk Scoring System (IPSS-R):

The most common system is the Revised International Prognostic Scoring System (IPSS-R), which is based on several factors:

• The percentage of blasts (immature cells) in the bone marrow.
• The type and severity of cytopenias (low blood cell counts).
• The number and type of chromosomal abnormalities.

Based on this information, patients are placed into a risk group (very low, low, intermediate, high, or very high). This risk stratification is crucial for deciding on the intensity of treatment.

What Are the Treatment Options for Myelodysplastic Syndrome (MDS)?

The treatment plan for MDS is highly personalized and depends on the specific type of MDS, the patient’s risk group, and their symptoms.

1. Supportive Care

Supportive care is a key part of MDS treatment and is often the main treatment for low-risk patients. The goal is to manage symptoms and improve a patient’s quality of life.

• Blood Transfusions: For patients with severe anemia, regular blood transfusions are used to relieve fatigue and other symptoms.
• Growth Factors: Medications called growth factors (such as erythropoietin) can be used to stimulate the bone marrow to produce more healthy blood cells.
• Iron Chelation Therapy: For patients who receive many blood transfusions, iron can build up in the body and cause damage to organs. Iron chelation therapy is used to remove this excess iron.

2. Medical Treatment (Targeted Therapy and Chemotherapy)

• Targeted Therapy: These drugs are a major advance in MDS treatment. They are designed to target specific genetic abnormalities in the cancer cells. For example, for patients with the del(5q) subtype, a drug called lenalidomide can be very effective at improving blood counts.
• Hypomethylating Agents: These drugs are used to change the genetic expression of the cells and can help some patients with higher-risk MDS or those who have not responded to other treatments.
• Immunosuppressive Therapy: In some cases, a patient’s own immune system may be attacking the bone marrow cells. Immunosuppressive drugs can be used to suppress the immune system and allow the bone marrow to produce healthy cells again.
• Chemotherapy: For patients with very high-risk MDS or those who are in a blast phase, intensive chemotherapy, similar to that used for AML, may be an option.

3. Stem Cell Transplant (Bone Marrow Transplant)

A stem cell transplant is the only known cure for MDS. It is a very intensive treatment that is usually reserved for younger, healthier patients with high-risk disease, especially if the MDS has progressed to a more serious stage. It involves destroying the patient’s bone marrow with high-dose chemotherapy and then replacing it with healthy, blood-forming stem cells from a donor [HLA matched].

Prognosis and Survival Rates for Myelodysplastic Syndrome (MDS)

The prognosis (the likely outcome of the disease) for MDS varies greatly. Many people with MDS live for several years, especially with lower-risk types. With proper care, patients can often continue their daily activities and maintain a good quality of life.

Prognostic Factors:

• The most important factors affecting prognosis are the specific type of MDS, the patient’s risk score (IPSS-R), the patient’s age and overall health, and how the disease responds to treatment.

Survival Rates:

• The survival rate for MDS varies widely by subtype and risk score. For low-risk MDS, the median survival can be over 5 years. For high-risk MDS, the median survival is much shorter. It is important to remember that these statistics are averages, and a person’s individual prognosis may be very different.

It is crucial to discuss your specific prognosis with your hematologist (a doctor who specializes in blood diseases), as they can provide a more accurate picture based on your individual case.

Screening and Prevention of Myelodysplastic Syndrome (MDS)

There are no routine screening tests for MDS in the general population. The best way to reduce your risk is to avoid known risk factors.

Prevention Strategies:

• Do Not Smoke: The single most important way to reduce your risk is to quit smoking.
• Avoid Chemical and Radiation Exposure: If your profession involves exposure to certain chemicals, use proper protective equipment.

For International Patients: Your Seamless Journey to Apollo Hospitals

Apollo Hospitals is a leading medical destination for international patients seeking high-quality and affordable cancer care. Our dedicated International Patient Services team is here to ensure your entire experience is as smooth and comfortable as possible. We have extensive experience treating patients with complex conditions, including MDS.

Our Services for International Patients Include:

• Travel and Visa Assistance: We will provide you with a visa invitation letter and help with travel arrangements.
• Airport Transfers: We will arrange for a car to pick you up from the airport.
• Personalized Care: A dedicated patient coordinator will be your single point of contact, assisting with hospital admission, language interpretation, and any other needs you may have.
• Accommodation: We can assist you with booking suitable accommodation for you and your family near the hospital.
• Post-Treatment Follow-up: We will stay in touch with you after your return home to ensure a smooth recovery.

About Apollo Proton Cancer Centre

Apollo Proton Cancer Centre (APCC) is the first proton therapy centre in India. APCC has a fully integrated treatment suite that offers the most advanced treatment in surgical, radiation, and medical oncology procedures. True to the Apollo Pillars of Expertise and Excellence, the Centre brings together a powerful team of clinicians renowned globally for cancer care.

At Apollo Proton Cancer Centre (APCC), we combine advanced technology with globally renowned clinical expertise to deliver superior outcomes and improved quality of life to our patients.