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The kidney is divided into parenchyma and renal sinus. The renal sinus is hyperechoic and is composed of calyces, the renal pelvis, fat and the major intrarenal vessels. In the normal kidney, the urinary collecting system in the renal sinus is not visible, but it creates a heteroechoic appearance with the interposed fat and vessels.
Renal biopsy (also kidney biopsy) is a medical procedure in which a small piece of kidney is removed from the body for examination, usually under a microscope. [1] Microscopic examination of the tissue can provide information needed to diagnose, monitor or treat problems of the kidney.
An estimate of the GFR is used clinically to determine the degree of kidney impairment and to track the progression of the disease. The GFR, however, does not reveal the source of the kidney disease. This is accomplished by urinalysis, measurement of urine protein excretion, kidney imaging, and, if necessary, kidney biopsy. [1]
Most glomerulonephritis' classification and prognosis are aided by histological evaluation by renal biopsy. [3] The renal biopsy is classically evaluated with light microscopy, electron microscopy, and immunohistology to diagnose a histological pattern, which is then compared to clinical evaluation through history, physical, and laboratory evaluation. [3]
The United Network for Organ Sharing (UNOS) is a non-profit scientific and educational organization that administers the only Organ Procurement and Transplantation Network (OPTN) in the United States, established (42 U.S.C. § 274) by the U.S. Congress in 1984 by Gene A. Pierce, founder of United Network for Organ Sharing.
Rapidly progressive glomerulonephritis (RPGN) is a syndrome of the kidney that is characterized by a rapid loss of kidney function, [4] [5] (usually a 50% decline in the glomerular filtration rate (GFR) within 3 months) [5] with glomerular crescent formation seen in at least 50% [5] or 75% [4] of glomeruli seen on kidney biopsies.
Glomerulosclerosis is the hardening of the glomeruli 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 urea from the blood. Proteinuria (large amounts of protein in the urine) is one of the signs of glomerulosclerosis. Scarring disturbs the ...
A kidney biopsy will provide a fully definitive diagnosis of nephritic syndrome and may also reveal the underlying cause of the nephritic syndrome depending on the underlying pathological process. On biopsy , a patient with nephritic syndrome would show inflammation of numerous glomeruli .