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light chain deposition disease
Light chain deposition disease (LCDD) is a rare blood cell disease which is characterized by deposition of fragments of infection-fighting immunoglobulins, called light chains (LCs), in the body. LCs are normally cleared by the kidneys, but in LCDD, these light chain deposits damage organs and cause disease. The kidneys are almost always affected and this often leads to kidney failure. About half of people with light chain deposition disease also have multiple myeloma. Unlike in AL amyloidosis, in which light chains are laid down in characteristic amyloid deposits, in LCDD, light chains are deposited in non-amyloid granules.〔
==Signs and symptoms==
The kidney is the organ most frequently affected. Proteinuria, loss of protein in the urine, is characteristic. More than 90% of people with LCDD develop kidney failure, often with rapid progression of disease.
Light chains may be deposited in many other organs and may or may not result in any symptoms. Other than the kidneys, liver and heart are the most commonly involved organs. Deposition of light chains in the liver may lead to hepatomegaly, an enlarged liver, or rarely portal hypertension or liver failure. The heart is affected in up to 80% of patients with LCDD, and may cause arrythmias and congestive heart failure.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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