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At the Mayo Clinic, MGUS transformed into multiple myeloma or similar lymphoproliferative disorders at the rate of about 1–2% a year, or 17%, 34%, and 39% at 10, 20, and 25 years, respectively, of follow-up—among surviving patients. However, because they were elderly, most patients with MGUS died of something else and did not go on to ...
Monoclonal gammopathy, also known as paraproteinemia, is the presence of excessive amounts of myeloma protein or monoclonal gamma globulin in the blood. It is usually due to an underlying immunoproliferative disorder or hematologic neoplasms, especially multiple myeloma. It is sometimes considered equivalent to plasma cell dyscrasia.
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 ...
[3] [4] The diagnosis of the disease rests on subacutely evolving weakness after age 40, normal to low CK level, a myopathic EMG with fibrillations, and often a monoclonal gammopathy. The diagnosis is confirmed by visualizing rods in cryosections on light and electron microscopy. The associated monoclonal gammopathy has an unfavorable prognosis.
Being asymptomatic, monoclonal gammopathy of undetermined significance and smoldering multiple myeloma are typically diagnosed fortuitously by detecting a myeloma protein on serum protein electrophoresis tests done for other purposes. MGUS is a relatively stable condition afflicting 3% of people aged 50 and 5% of people aged 70; it progresses ...
Precancerous conditions of the skin or oral cavity can appear as visible lesions without associated pain or discomfort, [7] while precancerous conditions of the hematological system are typically asymptomatic, and in the case of monoclonal gammopathy of unknown significance, it may only rarely cause numbness and tingling in the hands and feet ...
[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 ...
Robert A. Kyle is a professor of medicine, Laboratory Medicine and Pathology at the Mayo Clinic.He specializes in the care of patients with plasma cell dyscrasias. . Throughout his career Kyle has published more than 1,850 scientific papers and abstracts on myeloma and other plasma cell diso