Primary amyloidosis causes

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Syed Hassan A. Kazmi BSc, MD [2]

The cause of AL amyloidosis is usually a plasma cell dyscrasia, an acquired abnormality of the plasma cell in the bone marrow with production of an abnormal light chain protein (a component of an antibody).

• The cause of AL amyloidosis is usually a plasma cell dyscrasia, an acquired abnormality of the plasma cell in the bone marrow with production of an abnormal light chain protein (a component of an antibody).
• The increased production of plasma cell clone leads to extra-cellular deposition of fibril-forming monoclonal immunoglobulin (Ig) light chains (LC) (most commonly of lambda isotype)
• Typically, an excess amount of antibody protein is produced and the abnormal light chain portion or the whole antibody molecule accumulates in the organs in the form of amyloid deposits.

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