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Monoclonal gammopathy of renal significance (MGRS) are a group of kidney disorders that present with kidney damage due to nephrotoxic monoclonal immunoglobulins (M proteins) secreted by clonal plasma cells or B cells. By definition, people with MGRS do not meet criteria for multiple myeloma or other hematologic malignancies. [1]
These diseases include monoclonal gammopathy of undetermined significance, smoldering multiple myeloma, multiple myeloma and Waldenström's macroglobulinemia. Almost 29% of monoclonal gammopathy patients may have MIDD. [5] In MIDD, these abnormal immunoglobulins, or fragments of them, are deposited along the basement membrane of the kidney.
The most common type of paraproteinemia is monoclonal gammopathy of undetermined significance (MGUS). Another form, monoclonal gammopathy of renal significance (MGRS) results in kidney damage and chronic kidney disease due to the effects of monoclonal immunoglobulins. [5]
MGUS resembles multiple myeloma and similar diseases, but the levels of antibodies are lower, [2] the number of plasma cells (white blood cells that secrete antibodies) in the bone marrow is lower, and it rarely has symptoms or major problems. However, since MGUS can lead to multiple myeloma, which develops at the rate of about 1.5% a year, or ...
In hematology, plasma cell dyscrasias (also termed plasma cell disorders and plasma cell proliferative diseases) are a spectrum of progressively more severe monoclonal gammopathies in which a clone or multiple clones of pre-malignant or malignant plasma cells (sometimes in association with lymphoplasmacytoid cells or B lymphocytes) over-produce and secrete into the blood stream a myeloma ...
[1] [4] Even if patients do not have a monoclonal gammopathy before a diagnosis of crystal-storing histiocytosis, they are often tested to see if there is an underlying monoclonal gammopathy, due to the link between the disorders. [1] Patients who do not have a monoclonal gammopathy at diagnosis should be regularly tested to detect if one ...
Serum protein electrophoresis showing a paraprotein (spike/peak in the gamma zone) in a patient with multiple myeloma.. A myeloma protein is an abnormal antibody (immunoglobulin) or (more often) a fragment thereof, such as an immunoglobulin light chain, that is produced in excess by an abnormal monoclonal proliferation of plasma cells, typically in multiple myeloma or Monoclonal gammopathy of ...
Light chain deposition disease can affect any organ. [3] Renal involvement is always present and can be identified by microscopic hematuria and proteinuria.Due to the gradual buildup of light chains from plasma filtration, renal function rapidly declines in the majority of patients with LCDD as either acute tubulointerstitial nephritis or rapidly progressing glomerulonephritis.