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Alternative Names Return to topAmyloid - primary
Definition Return to top
Primary amyloidosis is a disorder in which protein fibers are deposited in tissues and organs, harming them.
Causes Return to top
The cause of primary amyloidosis is unknown, but the condition is related to abnormal production of antibodies by a type of immune cell called plasma cells.
The symptoms depend on the organs affected by the deposits. These organs can include the tongue, intestines, skeletal and smooth muscles, nerves, skin, ligaments, heart, liver, spleen, and kidneys.
Primary amyloidosis can result in conditions that include:
The deposits build up in the affected organs, causing them to become stiff, which decreases their ability to function.
Risk factors have not been identified. Primary amyloidosis is rare. It is similar to multiple myeloma, and is treated the same way.
Symptoms Return to top
Additional symptoms that may be associated with this disease:
Exams and Tests Return to top
Your doctor may discover that you have an enlarged liver or spleen.
If specific organ damage is suspected, your doctor may order tests to confirm amyloidosis of that organ. For example:
This disease may also alter the results of the following tests:
Treatment Return to top
Some patients with primary amyloidosis respond to chemotherapy directed at the abnormal plasma cells. Stem cell transplantation may be used, as in multiple myeloma.
In secondary amyloidosis, aggressive treatment of the underlying disease can improve symptoms and/or slow progression of disease. Complications such as heart failure, kidney failure, and other problems can sometimes be treated as necessary.
Outlook (Prognosis) Return to top
The severity of the disease depends upon the organs affected. Heart and kidney involvement may lead to organ failure and death. Systemic involvement is associated with death within 1 to 3 years.
Possible Complications Return to top
When to Contact a Medical Professional Return to top
Call your health care provider if symptoms consistent with primary amyloidosis develop.
If you know you have primary amyloidosis, call your health care provider if difficulty breathing, persistent swelling of the ankles or other areas, decreased urine output, or other symptoms occur. This may indicate that complications have developed.
Prevention Return to top
There is no known prevention.
References Return to top
Buxbaum JN. The Amyloidoses. In: Goldman L, Ausiello D. Cecil Textbook of Medicine. 22nd ed. Philadelphia, Pa: WB Saunders; 2004.
Hoffman R, Benz Jr. EJ, Shattil SJ, et al., eds. Hematology: Basic Principles and Practice. 4th ed. Philladelphia, Pa: Churchill Livingston; 2005:1540-48.Update Date: 2/23/2009 Updated by: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.