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Kidney showing circumscribed calcium deposits together with a partial stag horn calculus. Nephrocalcinosis, once known as Albright's calcinosis after Fuller Albright, is a term originally used to describe the deposition of poorly soluble calcium salts in the renal parenchyma due to hyperparathyroidism.
The kidney is surrounded by a capsule separating the kidney from the echogenic perirenal fat, which is seen as a thin linear structure. [1] 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.
Due to its high renal clearance, dihydroxyadenine may be secreted tubularly in addition to being filtered. [23] Thus, APRT deficiency causes elevated dihydroxyadenine levels in the urine. [24] Dihydroxyadenine precipitates in renal parenchyma and becomes extremely insoluble in urine, forming crystals that can accumulate, grow, and form stones. [25]
Ultrasound findings that indicate pyelonephritis are enlargement of the kidney, edema in the renal sinus or parenchyma, bleeding, loss of corticomedullary differentiation, abscess formation, or an areas of poor blood flow on doppler ultrasound. [21] However, ultrasound findings are seen in only 20–24% of people with pyelonephritis. [21]
Kidney disease, or renal disease, technically referred to as nephropathy, is damage to or disease of a kidney. Nephritis is an inflammatory kidney disease and has several types according to the location of the inflammation. Inflammation can be diagnosed by blood tests. Nephrosis is non-inflammatory kidney disease.
Segmental hypoplasia or Ask-Upmark kidney is a rare renal disease where a part of the kidney has undergone hypoplasia. The number of renal lobes is reduced, and the kidney size is less than two standard deviations from the average, with the weight often being over 50g in adults and 12–25g in children.
Scarring disturbs the filtering process of the kidneys and allows protein to leak from the blood into the urine. However, glomerulosclerosis is one of many causes of proteinuria. A kidney biopsy (the removal of a tiny part of the kidney with a needle) may be necessary to determine whether a patient has glomerulosclerosis or another kidney problem.
The cause of chronic kidney disease is sometimes unknown; it is referred to as chronic kidney disease of unknown aetiology (CKDu). As of 2020 [update] a rapidly progressive chronic kidney disease, unexplained by diabetes and hypertension, had increased dramatically in prevalence over a few decades in several regions in Central America and ...