Nephritis

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Retrieved

2021-01-18

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Wikipedia

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Nephritis is inflammation of the kidneys and may involve the glomeruli, tubules, or interstitial tissue surrounding the glomeruli and tubules.

Types

Glomerulonephritis is inflammation of the glomeruli. Glomerulonephritis is often implied when using the term "nephritis" without qualification.
Interstitial nephritis (or tubulo-interstitial nephritis) is inflammation of the spaces between renal tubules.

Causes

Nephritis is often caused by infections, and toxins, but is most commonly caused by autoimmune disorders that affect the major organs like kidneys.

Pyelonephritis is inflammation that results from a urinary tract infection that reaches the renal pelvis of the kidney.
Lupus nephritis is inflammation of the kidney caused by systemic lupus erythematosus (SLE), a disease of the immune system.
Athletic nephritis is nephritis resulting from strenuous exercise. Bloody urine after strenuous exercise may also result from march hemoglobinuria, which is caused by trauma to red blood cells, causing their rupture, which leads to the release of hemoglobin into the urine.

Mechanism

Renin–angiotensin system

Nephritis can produce glomerular injury, by disturbing the glomerular structure with inflammatory cell proliferation. This can lead to reduced glomerular blood flow, leading to reduced urine output (oliguria) and retention of waste products (uremia). As a result, red blood cells may leak out of damaged glomeruli, causing blood to appear in the urine (hematuria).

Low renal blood flow activates the renin–angiotensin–aldosterone system (RAAS), causing fluid retention and mild hypertension. As the kidneys inflame, they begin to excrete needed protein from the affected individual's body into the urine stream. This condition is called proteinuria.

Loss of necessary protein due to nephritis can result in several life-threatening symptoms. The most serious complication of nephritis can occur if there is significant loss of the proteins that keep blood from clotting excessively. Loss of these proteins can result in blood clots, causing sudden stroke.

Diagnosis

The diagnosis depends on the cause of the nephritis, in the case of lupus nephritis, blood tests, X-rays and an ultrasound can help ascertain if the individual has the condition.

Treatment

Disease burden of nephritis/nephrosis worldwide in 2004.

no data

less than 40

40–120

120–200

200–280

280–360

360–440

440–520

520–600

600–680

680–760

Treatment (or management) of nephritis depends on what has provoked the inflammation of the kidney(s). In the case of lupus nephritis, hydroxychloroquine could be used.

Prevalence

Nephritis represents the ninth most common cause of death among all women in the US (and the fifth leading cause among non-Hispanic black women).

Worldwide the highest rates of nephritis are 50-55% for African or Asian descent, then Hispanic at 43% and Caucasian at 17%.

The average age of this inflammation (lupus nephritis in this case) is about 28.4 years old for an individual who has been diagnosed with the condition