Myeloma Bone Disease / Multiple Myeloma

What is myeloma bone disease?

Myeloma bone disease is cancer that affects certain white blood cells called plasma cells. Nearly 13,000 new cases of myeloma bone disease are diagnosed (mostly in persons over age 60) each year, with women affected twice as often as men.

Plasma cells, and other white blood cells, are part of the immune system. Plasma cells produce antibodies - proteins that assist the body in ridding itself of harmful substances. Each plasma cell responds to one specific substance by producing one kind of antibody. The body has many types of plasma cells, and, therefore, can respond to many types of substances.

When cancer occurs, the body overproduces plasma cells, which are abnormal and alike. These abnormal plasma cells are called myeloma cells.

Myeloma cells collect in the bone marrow and the outer layer of the bone. Because the cells begin in the blood plasma, myeloma is not a bone cancer, but is cancer that affects bones.

What causes myeloma bone disease?

The exact cause of myeloma bone disease is not known, but theories and associations have been suggested as risk factors.

What are the risk factors for myeloma bone disease?

Suggested risk factors for myeloma bone disease include the following:

• family history
• exposure to petroleum and other chemicals
• exposure to high amounts of radiation

What are the symptoms of myeloma bone disease?

The following are the most common symptoms for myeloma bone disease. However, each individual may experience symptoms differently. Myeloma cells and antibodies may cause the following:

• bone pain
• fractures in bones
• weakness
• fatigue
• weight loss
• repeated infections
• nausea
• vomiting
• constipation
• problems with urination
• weakness or numbness in legs
• back pain
• rib pain

The symptoms of myeloma bone disease may resemble other bone disorders or medical problems. Always consult your physician for a diagnosis.

How is myeloma bone disease diagnosed?

In addition to a complete medical history and physical examination, diagnostic procedures for myeloma bone disease may include the following:

• x-ray - a diagnostic test which uses invisible electromagnetic energy beams to produce images of internal tissues, bones, and organs onto film.
• blood and urine tests
• bone marrow biopsy - a procedure in which tissue samples are removed (with a needle or during surgery) from the body for examination under a microscope; to determine if cancer or other abnormal cells are present.
• magnetic resonance imaging (MRI) - a diagnostic procedure that uses a combination of large magnets, radiofrequencies, and a computer to produce detailed images of organs and structures within the body.

Treatment for myeloma bone disease:

Specific treatment formyeloma bone disease will be determined by your physician based on:

• your age, overall health, and medical history
• extent of the disease
• your tolerance for specific medications, procedures, or therapies
• expectations for the course of the disease
• your opinion or preference

Treatment may include:

• medications (to control pain)
• fracture treatment
• radiation therapy (to control pain)
• chemotherapy
• alpha interferon - a biological response modifier (a substance that stimulates or improves the ability of the body's immune system to fight disease) that interferes with the division of cancer cells, therefore slowing tumor growth. Interferons are substances normally produced by the body but can by produced in the laboratory.
• bone marrow transplantation