Multiple Myeloma

Overview

Multiple myeloma is a type of blood cancer that begins in plasma cells. Plasma cells are a kind of white blood cell found mainly in the bone marrow, the soft tissue inside bones. Their normal role is to help the immune system fight infections by producing antibodies.

In multiple myeloma, abnormal plasma cells grow and multiply in the bone marrow. These cells can crowd out healthy blood-forming cells and may produce an abnormal antibody protein. Over time, this can affect the bones, kidneys, blood counts and immune system.

Multiple myeloma is usually a long-term condition that may develop gradually. Some people are diagnosed after symptoms appear, while others are found to have early or related conditions during routine blood tests. Care is typically provided by specialists in hematology and oncology, often with support from other medical teams depending on the person’s needs.

Symptoms

The symptoms of multiple myeloma can vary widely. Some people have no symptoms at first, while others experience problems related to the bones, blood, kidneys or immune system.

• Bone pain, often in the back, ribs, hips or skull
• Bone weakness or fractures that occur more easily than expected
• Fatigue, weakness or shortness of breath due to low red blood cell levels
• Frequent or unusual infections
• Unexplained weight loss or reduced appetite
• Increased thirst, nausea, constipation or confusion, which may be related to high calcium levels
• Kidney problems, sometimes noticed through abnormal blood or urine tests
• Numbness, tingling or weakness, especially if nerves are affected

These symptoms can also be caused by many other medical conditions. A medical evaluation is needed to understand the cause.

Causes and Risk Factors

The exact cause of multiple myeloma is not fully understood. It develops when changes occur in the genetic material of plasma cells, causing them to grow in an abnormal and uncontrolled way. These changes are usually acquired during life rather than inherited directly from a parent.

Several factors may increase the risk of developing multiple myeloma, although having a risk factor does not mean a person will develop the disease.

• Older age
• Male sex
• Family history of multiple myeloma or related blood disorders
• Previous diagnosis of a plasma cell condition such as monoclonal gammopathy of undetermined significance
• Weakened immune function or certain long-term inflammatory conditions
• Exposure to certain chemicals or radiation in some occupational or environmental settings

Many people diagnosed with multiple myeloma have no clearly identifiable cause. Research continues to improve understanding of why the disease develops and how it behaves in different individuals.

Diagnosis

Diagnosis of multiple myeloma usually involves a combination of blood tests, urine tests, bone marrow examination and imaging studies. The goal is to confirm whether abnormal plasma cells are present, assess the effects on the body and understand the stage and characteristics of the disease.

Blood tests may evaluate blood cell counts, kidney function, calcium levels and abnormal proteins produced by myeloma cells. Urine tests can help detect proteins that may affect kidney function. A bone marrow biopsy may be performed to examine the number and appearance of plasma cells and to carry out specialized laboratory testing.

Imaging tests may be used to look for bone damage or other changes. These may include X-rays, computed tomography, magnetic resonance imaging or other advanced imaging methods, depending on the clinical situation.

Doctors may also perform genetic and molecular tests on myeloma cells. These tests do not predict the future with certainty, but they can help the medical team understand disease features and plan an appropriate treatment approach.

Treatment Options

Treatment for multiple myeloma is individualized. It depends on factors such as symptoms, disease stage, kidney function, overall health, age, test results and patient preferences. Some people with very early or inactive disease may be monitored closely before treatment is needed.

When treatment is recommended, it may include a combination of approaches. These can involve medicines that target myeloma cells, therapies that support the immune system in recognizing cancer cells, corticosteroid-based treatment, chemotherapy in selected situations and stem cell transplantation for eligible patients. Radiation therapy may be used to control pain or treat specific areas of bone disease.

Supportive care is an important part of treatment. This may include management of bone health, anemia, infections, kidney problems, pain and general wellbeing. Rehabilitation, nutrition support and psychological care may also be helpful for some patients.

Multiple myeloma care often involves ongoing follow-up. Doctors monitor treatment response, side effects and signs that the disease is changing. Treatment plans may be adjusted over time based on how the disease responds and how the patient feels.

When to See a Doctor

Medical advice should be sought if a person has persistent bone pain, unexplained fatigue, repeated infections, unexpected weight loss, frequent fractures or abnormal blood or urine test results. These signs do not necessarily mean multiple myeloma, but they should be assessed by a healthcare professional.

Urgent medical attention is needed for severe back pain with weakness or numbness in the legs, loss of bladder or bowel control, confusion, severe dehydration symptoms, sudden inability to walk, or signs of a serious infection such as high fever or difficulty breathing.

People already diagnosed with multiple myeloma should keep regular appointments with their oncology or hematology team. They should report new symptoms, worsening pain, changes in urination, fever, unusual bleeding or side effects from treatment promptly. Early communication helps the care team respond to problems and adjust care when needed.