The most common form of Amyloidosis is AL amyloidosis (Amyloid light chain amyloidosis). In this condition, production of antibody proteins by the abnormal cells, present in the bone marrow, results in the amyloid. Secondary amyloidosis occurs in case of rheumatoid arthritis. Amyloidosis may occur due to hereditary reasons.
If the deposition of protein occurs over the heart, then heart is unable to pump the blood and may get enlarged. Due to this, heart failure may occur. Similarly, if the deposition takes place over the kidneys, then it leads to kidney failure.