Multiple myeloma is a rare but serious type of blood cancer that develops in plasma cells, a type of white blood cell found in the bone marrow. Plasma cells play an important role in your immune system by producing antibodies that help protect your body from infections. When these cells become cancerous, they multiply uncontrollably, crowding out healthy blood cells and affecting multiple organs throughout the body.
Although multiple myeloma is not among the most common cancers, it accounts for approximately 10% of all blood cancers worldwide. Advances in diagnosis, targeted therapies, and supportive care have significantly improved treatment outcomes, allowing many patients to live longer and maintain a better quality of life.
If you or someone you know has recently been diagnosed with multiple myeloma, understanding the disease is the first step toward making informed healthcare decisions. In this guide, we’ll explain what multiple myeloma is, its symptoms, possible causes, risk factors, and why early diagnosis matters.
What Is Multiple Myeloma?
Multiple myeloma is a cancer of plasma cells, which are produced inside the bone marrow. Under normal conditions, plasma cells create antibodies that help the body fight bacteria and viruses.
In multiple myeloma, abnormal plasma cells multiply rapidly and produce defective antibodies known as M proteins (monoclonal proteins). These abnormal proteins do not protect the body against infection and can build up in the blood and urine, causing complications.
As cancerous plasma cells continue to grow, they crowd out healthy blood-forming cells inside the bone marrow. This may lead to:
- Reduced red blood cells (anemia)
- Reduced white blood cells (higher infection risk)
- Reduced platelets (easy bruising or bleeding)
- Bone damage
- Kidney problems
Because multiple myeloma can affect several parts of the body, it is considered a systemic disease rather than a cancer limited to one organ.
How Does Multiple Myeloma Affect the Body?
Multiple myeloma primarily affects the bone marrow but can also impact the kidneys, immune system, bones, and blood.
Some of the most common complications include:
Bone Damage
Cancerous plasma cells stimulate the breakdown of bone tissue faster than the body can rebuild it. This may result in:
- Persistent bone pain
- Osteoporosis
- Bone fractures
- Loss of height
- Spinal compression
The spine, ribs, pelvis, and skull are among the most commonly affected bones.
Anemia
Healthy bone marrow produces red blood cells that carry oxygen throughout the body. When myeloma cells crowd the bone marrow, red blood cell production decreases, causing anemia.
Common symptoms include:
- Fatigue
- Weakness
- Shortness of breath
- Dizziness
Increased Risk of Infection
Since abnormal plasma cells do not produce effective antibodies, the immune system becomes weaker. People with multiple myeloma may experience recurrent bacterial or viral infections that require prompt medical attention.
Kidney Problems
The abnormal proteins produced by myeloma cells can accumulate in the kidneys and interfere with their ability to filter waste products from the blood. Kidney impairment is a common complication and may require close monitoring during treatment.
Common Symptoms of Multiple Myeloma
The symptoms of multiple myeloma can vary depending on how advanced the disease is. Some people experience only mild symptoms at first, while others develop more noticeable complications.
The most common symptoms include:
Persistent Bone Pain
Bone pain is often one of the earliest signs of multiple myeloma. It commonly affects the:
- Back
- Ribs
- Hips
- Shoulders
Pain may become worse during movement or physical activity.
Extreme Fatigue
Many patients feel unusually tired even after getting enough sleep. This is often caused by anemia resulting from reduced red blood cell production.
Frequent Infections
A weakened immune system makes it harder for the body to fight infections.
Common infections include:
- Pneumonia
- Urinary tract infections
- Sinus infections
- Skin infections
Unexplained Weight Loss
Some people lose weight without changing their diet or activity level. Unintentional weight loss should always be discussed with a healthcare professional.
Weakness
Reduced oxygen delivery due to anemia may cause general weakness and difficulty performing daily activities.
Numbness or Tingling
Bone damage in the spine may compress nearby nerves, leading to numbness, tingling, or weakness in the arms or legs.
Easy Bruising or Bleeding
Because platelet production may decrease, some people notice:
- Frequent nosebleeds
- Bleeding gums
- Easy bruising
- Small red or purple spots on the skin
What Causes Multiple Myeloma?
The exact cause of multiple myeloma remains unknown. Researchers believe it develops through a combination of genetic changes and environmental factors.
Normally, plasma cells grow, divide, and die in a controlled manner. In multiple myeloma, certain genetic mutations cause these cells to multiply uncontrollably and survive longer than they should.
Scientists continue to study why these mutations occur, but there is currently no known way to prevent the disease completely.
Risk Factors for Multiple Myeloma
Several factors may increase the likelihood of developing multiple myeloma. Having one or more risk factors does not necessarily mean someone will develop the disease, but awareness can help support earlier diagnosis.
Increasing Age
Most cases are diagnosed in adults over the age of 60. The risk generally increases as people get older.
Family History
People with a close family member who has multiple myeloma may have a slightly higher risk than the general population.
Certain Blood Disorders
Some patients develop multiple myeloma after a condition known as Monoclonal Gammopathy of Undetermined Significance (MGUS), which requires regular medical monitoring.
Environmental Exposure
Some studies have explored possible links between long-term exposure to certain chemicals, pesticides, or radiation and an increased risk of blood cancers. However, these associations are still being researched and do not establish direct causation.
Weakened Immune System
Individuals with certain immune disorders or those receiving treatments that affect the immune system may have a higher risk of developing plasma cell disorders.
When Should You See a Doctor?
Many of the symptoms of multiple myeloma such as fatigue, back pain, or recurrent infections can also be caused by less serious conditions. However, if these symptoms are persistent, worsening, or occur together, it’s important to seek medical evaluation.
A healthcare provider may recommend blood tests, urine tests, imaging studies, or other investigations to determine the underlying cause.
Early diagnosis can help guide treatment decisions and may improve long-term outcomes.
How Is Multiple Myeloma Diagnosed?
Diagnosing multiple myeloma usually begins with a review of your symptoms, medical history, and a physical examination. If multiple myeloma is suspected, your doctor may recommend several tests to confirm the diagnosis and assess how much the disease has progressed.
Blood Tests
Blood tests are often the first step in identifying abnormalities associated with multiple myeloma.
These tests may help evaluate:
- Red blood cell count (to check for anemia)
- White blood cell count
- Platelet count
- Kidney function
- Calcium levels
- Albumin levels
- Beta-2 microglobulin
- Lactate dehydrogenase (LDH)
Doctors also perform specialized blood tests to detect monoclonal proteins (M proteins) produced by abnormal plasma cells.
These include:
- Serum Protein Electrophoresis (SPEP)
- Serum Immunofixation
- Serum Free Light Chain Assay
These tests help identify the abnormal proteins commonly associated with multiple myeloma.
Urine Tests
Some patients release abnormal proteins called Bence Jones proteins into their urine.
A urine test may include:
- Urine Protein Electrophoresis (UPEP)
- Immunofixation
- 24-hour urine protein collection
These tests help determine whether the kidneys are being affected by the disease.
Bone Marrow Biopsy
A bone marrow biopsy is one of the most important tests for confirming multiple myeloma.
During this procedure, a doctor removes a small sample of bone marrow, usually from the hip bone, using a specialized needle.
The sample is examined under a microscope to determine:
- Percentage of plasma cells
- Abnormal plasma cell characteristics
- Chromosomal abnormalities
- Genetic mutations
These findings help confirm the diagnosis and may influence treatment decisions.
Imaging Tests
Because multiple myeloma frequently affects bones, imaging studies help identify bone damage before serious complications occur.
Your doctor may recommend:
X-rays
Traditional skeletal surveys can identify areas where bone has become weak or damaged.
CT Scan
A CT scan provides more detailed images of bones and can detect small lesions not always visible on standard X-rays.
MRI Scan
MRI is particularly useful when evaluating:
- Bone marrow involvement
- Spine abnormalities
- Nerve compression
PET-CT Scan
PET-CT combines metabolic and structural imaging, helping doctors identify active disease throughout the body and monitor treatment response.
Understanding the CRAB Features
Many healthcare professionals use the CRAB acronym to remember the major complications associated with active multiple myeloma.
C – High Calcium Levels
Excessive bone breakdown releases calcium into the bloodstream.
Symptoms may include:
- Increased thirst
- Constipation
- Confusion
- Frequent urination
- Nausea
R – Renal (Kidney) Problems
Abnormal proteins produced by myeloma cells can damage the kidneys.
Possible symptoms include:
- Swelling
- Reduced urine output
- Fatigue
- Elevated creatinine levels
A – Anemia
Reduced production of healthy red blood cells can cause:
- Persistent tiredness
- Pale skin
- Dizziness
- Shortness of breath
B – Bone Disease
Bone damage remains one of the most common complications.
Patients may experience:
- Bone pain
- Fractures
- Osteoporosis
- Spinal compression
Stages of Multiple Myeloma
After confirming the diagnosis, doctors determine the stage of the disease.
Staging helps estimate:
- Disease severity
- Expected progression
- Appropriate treatment approach
- Prognosis
The most widely used system is the Revised International Staging System (R-ISS).
Stage I
Stage I represents the earliest stage.
Patients generally have:
- Lower disease burden
- Better kidney function
- Favorable laboratory findings
- Better overall outlook
Many people respond well to treatment at this stage.
Stage II
Stage II represents an intermediate stage.
Patients may have:
- Moderate disease activity
- Higher plasma cell levels
- Some laboratory abnormalities
Treatment remains effective for many individuals, although closer monitoring is often required.
Stage III
Stage III indicates more advanced disease.
Patients often have:
- Higher beta-2 microglobulin levels
- More extensive bone marrow involvement
- Greater likelihood of bone damage
- Increased risk of kidney complications
Although Stage III is more advanced, modern therapies have significantly improved treatment outcomes.
Possible Complications of Multiple Myeloma
Without appropriate management, multiple myeloma can lead to several complications.
Bone Fractures
Weak bones increase the risk of fractures, even after minor injuries.
Kidney Damage
Kidney impairment may occur due to abnormal protein accumulation and high calcium levels.
Maintaining adequate hydration and following medical advice may help support kidney health during treatment.
Frequent Infections
Reduced immune function makes patients more vulnerable to infections.
Doctors may recommend preventive measures such as vaccinations and infection monitoring.
Blood Clot Risk
Some treatment plans may increase the risk of blood clots.
Healthcare providers assess each patient’s individual risk and may recommend preventive strategies when appropriate.
Spinal Cord Compression
When weakened vertebrae collapse, pressure may be placed on the spinal cord.
Symptoms include:
- Severe back pain
- Weakness
- Difficulty walking
- Changes in bladder or bowel control
This is considered a medical emergency and requires immediate attention.
Treatment Options for Multiple Myeloma
Several types of treatment may be used alone or in combination.
Immunomodulatory Drugs (IMiDs)
Immunomodulatory drugs help strengthen the immune system while also slowing the growth of myeloma cells.
Common medicines include:
- Lenalidomide
- Pomalidomide
- Thalidomide
These medicines play a central role in the treatment of many patients with multiple myeloma.
Proteasome Inhibitors
Proteasome inhibitors interfere with the way myeloma cells process proteins, leading to cancer cell death.
Examples include:
These medicines are frequently combined with immunomodulatory drugs and corticosteroids.
Monoclonal Antibodies
Monoclonal antibodies are designed to recognize specific proteins on cancer cells and help the immune system destroy them.
Examples include:
- Daratumumab
- Isatuximab
- Elotuzumab
These therapies have expanded treatment options, particularly for patients with relapsed or difficult-to-treat disease.
Corticosteroids
Medicines such as dexamethasone are commonly included in treatment regimens because they:
- Help kill myeloma cells
- Reduce inflammation
- Improve the effectiveness of other medicines
Chemotherapy
Although targeted therapies are now widely used, chemotherapy may still be recommended in certain situations, particularly before stem cell transplantation or when rapid disease control is needed.
Radiation Therapy
Radiation therapy may be used to:
- Relieve localized bone pain
- Treat isolated bone lesions
- Reduce pressure on nerves caused by damaged bones
It is generally used for specific areas rather than as treatment for the entire disease.
How Does Lenalidomide Work?
Lenalidomide is one of the most commonly prescribed medicines for multiple myeloma and has become an important part of many treatment plans.
It belongs to a group of medicines called immunomodulatory drugs (IMiDs).
Rather than working in just one way, Lenalidomide has multiple actions that help control the disease.
It may:
- Support the body’s immune response against abnormal plasma cells
- Slow the growth and survival of myeloma cells
- Reduce the formation of new blood vessels that help cancer cells grow
- Improve the effectiveness of certain combination treatments
Doctors often prescribe Lenalidomide together with other medicines rather than using it alone.
When Is Lenalidomide Used?
Like all prescription medicines, Lenalidomide can cause side effects, although not everyone experiences them.
Some commonly reported side effects include:
- Fatigue
- Low white blood cell count
- Low platelet count
- Anemia
- Constipation or diarrhea
- Skin rash
- Muscle cramps
- Increased risk of infections
Some patients may also have an increased risk of blood clots, especially when Lenalidomide is used with certain other medicines. Your healthcare provider may recommend preventive measures based on your individual risk.
If you notice unusual bleeding, fever, severe rash, shortness of breath, or swelling of the legs, seek medical attention promptly.
Never stop or change your medication without consulting your healthcare team.
Common Side Effects of Lenalidomide
Depending on your individual treatment plan, Lenalidomide may be recommended:
- As part of initial treatment for newly diagnosed multiple myeloma
- After stem cell transplantation as maintenance therapy
- For relapsed or recurrent multiple myeloma
- In combination with other anti-myeloma medicines
The treatment schedule and dosage vary from one patient to another and should always be determined by a qualified healthcare professional.
Supportive Care During Multiple Myeloma Treatment
Managing multiple myeloma involves more than treating cancer cells. Supportive care helps reduce symptoms and prevent complications.
Supportive care may include:
Bone Health
Doctors may recommend medications that help strengthen bones and reduce the risk of fractures.
Patients are also encouraged to:
- Stay physically active as advised
- Avoid activities that increase fracture risk
- Maintain adequate calcium and vitamin D intake if recommended
Infection Prevention
Since multiple myeloma and its treatments can weaken the immune system, infection prevention is especially important.
Simple steps include:
- Frequent handwashing
- Staying up to date with recommended vaccinations
- Avoiding close contact with people who have contagious illnesses
- Reporting fever or signs of infection promptly
Kidney Protection
Protecting kidney function is an important part of long-term care.
Healthcare providers may recommend:
- Staying well hydrated
- Avoiding unnecessary use of medications that may affect the kidneys
- Regular kidney function monitoring
Nutrition
A balanced diet supports overall health during treatment.
Patients are encouraged to:
- Eat a variety of fruits and vegetables
- Include lean protein sources
- Stay hydrated
- Discuss nutritional concerns with their healthcare provider or dietitian
Physical Activity
Regular physical activity, when appropriate, may help:
- Improve strength
- Reduce fatigue
- Maintain mobility
- Support emotional well-being
Exercise plans should always be tailored to each individual’s condition.
Living With Multiple Myeloma
Living with multiple myeloma often involves ongoing treatment and regular follow-up appointments.
Many patients continue to work, spend time with family, and enjoy daily activities while managing their condition.
Helpful strategies include:
- Keeping all medical appointments
- Taking medicines exactly as prescribed
- Reporting new symptoms promptly
- Maintaining a healthy lifestyle
- Seeking emotional support when needed
- Joining patient support groups if appropriate
Advances in treatment continue to improve long-term outcomes, giving many people the opportunity to live active and fulfilling lives.
Can Multiple Myeloma Return?
Multiple myeloma is often described as a chronic condition with periods of remission and relapse.
Even after successful treatment, regular monitoring is important because the disease may return over time.
Doctors typically perform routine blood tests, imaging, and other evaluations to monitor disease activity and determine whether additional treatment is needed.
Looking Ahead
Research into multiple myeloma continues to evolve rapidly. New targeted therapies, immunotherapies, and combination treatments are expanding options for patients around the world. Participation in clinical trials may also be considered for some individuals, depending on their circumstances and the advice of their healthcare team.
Can Multiple Myeloma Be Prevented?
At present, there is no proven way to prevent multiple myeloma because the exact cause remains unknown. Most people diagnosed with the disease have no clear or preventable risk factor.
However, maintaining good overall health may support your well-being and make it easier to manage treatment if you are diagnosed. Healthy habits include:
- Eating a balanced diet rich in fruits and vegetables
- Staying physically active according to your doctor’s advice
- Avoiding tobacco products
- Limiting alcohol consumption
- Maintaining a healthy weight
- Attending regular health check-ups
- Discussing persistent symptoms with your healthcare provider promptly
These measures cannot prevent multiple myeloma but contribute to better overall health.
Access to Lenalidomide
Lenalidomide is one of the medicines that may be prescribed by specialists as part of a comprehensive treatment plan for eligible patients with multiple myeloma.
If your healthcare provider recommends Lenalidomide, it is important to:
- Obtain the medicine from a trusted and reliable source.
- Follow the prescribed dosage exactly.
- Attend regular follow-up appointments and laboratory monitoring.
- Report any unusual side effects to your healthcare provider.
Patients seeking information about Lenalidomide, including product details, available strengths, and general medicine information, can explore the educational resources available through LetsMeds.
Frequently Asked Questions
Multiple myeloma is a type of blood cancer that develops in plasma cells found in the bone marrow. These abnormal cells multiply uncontrollably and can affect bones, kidneys, blood cell production, and the immune system.
While multiple myeloma is generally considered a chronic condition, significant advances in treatment have enabled many patients to achieve long periods of remission and improved quality of life. Your healthcare provider can discuss the treatment goals that are appropriate for your situation.
Early symptoms may include:
- Persistent bone pain
- Fatigue
- Frequent infections
- Weakness
- Unexplained weight loss
- Anemia
Because these symptoms can occur in many other conditions, medical evaluation is essential for an accurate diagnosis.
Doctors use a combination of blood tests, urine tests, bone marrow biopsy, and imaging studies such as CT, MRI, PET-CT, or X-rays to diagnose multiple myeloma and assess the extent of the disease.
Treatment options may include:
- Lenalidomide
- Pomalidomide
- Bortezomib
- Carfilzomib
- Daratumumab
- Corticosteroids
- Chemotherapy
- Stem cell transplantation
- Radiation therapy
The choice of treatment depends on individual patient factors.
Lenalidomide is an immunomodulatory medicine that helps the immune system recognize and respond to abnormal plasma cells. It is commonly used in combination with other medicines as part of a treatment plan prescribed by a specialist.
Many people continue to work, spend time with family, and enjoy everyday activities while receiving treatment. Advances in therapy have improved disease control and quality of life, although regular medical follow-up remains important.
Most cases are not inherited. Although having a close family member with multiple myeloma may slightly increase risk, the majority of patients have no family history of the disease.
Contact your healthcare provider promptly if you experience:
- High fever or signs of infection
- Severe bone pain
- Difficulty breathing
- Sudden weakness or numbness
- Heavy bleeding
- Reduced urine output
- Severe swelling or unexplained bruising
These symptoms may require urgent medical attention.
Patients in the Philippines have access to multiple myeloma treatment through government hospitals, private hospitals, cancer centers, and specialist hematology or oncology clinics.
Key Takeaways
- Multiple myeloma is a cancer of plasma cells in the bone marrow.
- Early symptoms often include bone pain, fatigue, infections, and anemia.
- Diagnosis involves blood tests, urine tests, imaging, and bone marrow biopsy.
- Treatment is individualized and may include Lenalidomide, targeted therapies, stem cell transplantation, and supportive care.
- Regular follow-up and adherence to your treatment plan are essential for managing the disease.
- Patients should always discuss treatment decisions with a qualified healthcare professional.
Conclusion
Multiple myeloma is a complex condition, but advances in medical research have greatly expanded the range of available treatments. Understanding the disease, recognizing early symptoms, and seeking timely medical care can help patients receive appropriate treatment and supportive care.
Medicines such as Lenalidomide have become an important part of treatment for many patients with multiple myeloma, often as part of combination therapy prescribed by specialists. However, treatment plans vary from person to person, making ongoing communication with your healthcare team essential.
Whether you are newly diagnosed, supporting a loved one, or looking to learn more about multiple myeloma, reliable information can help you make informed decisions throughout the treatment journey.
If you would like to learn more about Lenalidomide, its available strengths, and other specialty medicines, explore the educational resources available on LetsMeds and consult your healthcare provider for personalized medical advice.
References
- American Cancer Society. (2025). Multiple myeloma. https://www.cancer.org/cancer/types/multiple-myeloma.html
- International Myeloma Foundation. (n.d.). What is multiple myeloma? https://www.myeloma.org
- Mayo Clinic. (2025). Multiple myeloma – Symptoms and causes. https://www.mayoclinic.org/diseases-conditions/multiple-myeloma
- MedlinePlus. (n.d.). Multiple myeloma. U.S. National Library of Medicine. https://medlineplus.gov/multiplemyeloma.html
- National Cancer Institute. (2025). Multiple myeloma treatment (PDQ®)–Patient version. https://www.cancer.gov/types/myeloma
- National Comprehensive Cancer Network. (NCCN). (n.d.). NCCN Guidelines for Patients®: Multiple Myeloma. https://www.nccn.org/patients
- International Agency for Research on Cancer. (n.d.). World Health Organization – Cancer. https://www.iarc.who.int
- World Health Organization. (n.d.). Cancer. https://www.who.int/news-room/fact-sheets/detail/cancer