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Glomerular Sclerosis (GS)

Glomerulosclerosis refers to a hardening of the glomerulus in the kidney. It is a general term to describe scarring of the kidneys' tiny blood vessels, the glomeruli, the functional units in the kidney that filter urine from the blood. Proteinuria is one of the signs of glomerulosclerosis. Scarring disturbs the filtering process of the kidneys and allows protein to leak from the blood into urine. However, glomerulosclerosis is one of many causes of proteinuria. A kidney biopsy (removal of tiny part of kidney with a needle) may be necessary to determine whether a patient has glomerulosclerosis or another kidney problem. About 15 percent of people with proteinuria turn out to have glomerulosclerosis.