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Glomerulonephritis is inflammation of the tiny filters in the kidneys (glomeruli). The excess fluid and waste that glomeruli remove from the bloodstream exit the body as urine. Glomerulonephritis can come on suddenly (acute) or gradually (chronic).
Glomerulonephritis occurs on its own or as part of another disease, such as lupus or diabetes. Severe or prolonged inflammation associated with glomerulonephritis can damage the kidneys. Treatment depends on the type of glomerulonephritis you have.
Signs and symptoms of glomerulonephritis may vary depending on whether you have the acute or chronic form and the cause. You may notice no symptoms of chronic disease. Your first indication that something is wrong might come from the results of a routine urine test (urinalysis).
Make an appointment with your health care provider promptly if you have signs or Symptoms of glomerulonephritis.
Many conditions can cause glomerulonephritis. Sometimes the disease runs in families and sometimes the cause is unknown. Factors that can lead to inflammation of the glomeruli include the following conditions
Infectious diseases can directly or indirectly lead to glomerulonephritis. These infections include:
Post-streptococcal glomerulonephritis. Glomerulonephritis may develop a week or two after recovery from a strep throat infection or, rarely, a skin infection caused by a streptococcal bacteria (impetigo). Inflammation occurs when antibodies to the bacteria build up in the glomeruli. Children are more likely to develop post-streptococcal glomerulonephritis than are adults, and they're also more likely to recover quickly.
Bacterial endocarditis. Bacterial endocarditis is an infection of the inner lining of your heart's chambers and valves. It isn't clear whether the inflammation in the kidneys is the result of immune system activity alone or other factors.
Viral kidney infections. Viral infections of the kidney, such as hepatitis B and hepatitis C, cause inflammation of the glomeruli and other kidney tissues.
HIV. Infection with HIV, the virus that causes AIDS, can lead to glomerulonephritis and progressive kidney damage, even before the onset of AIDS.
Autoimmune diseases are illnesses caused by the immune system attacking healthy tissues. Autoimmune diseases that may cause glomerulonephritis include:
Goodpasture's syndrome. In this rare disorder, also known as anti-GBM disease, the immune system creates antibodies to tissues in the lungs and kidneys. It can cause progressive and permanent damage to the kidneys.
IgA nephropathy. Immunoglobulin A (IgA) is an antibody that's a first line of defense against infectious agents. IgA nephropathy occurs when deposits of the antibody accumulate in the glomeruli. The inflammation and subsequent damage may go undetected for a long time. The most common symptom is blood in the urine.
Vasculitis is inflammation of blood vessels. Types of vasculitis that can cause glomerulonephritis include:
Some diseases or conditions cause scarring of the glomeruli that results in poor and declining kidney function. These include:
High blood pressure. Long-term, poorly managed high blood pressure can cause scarring and inflammation of the glomeruli. Glomerulonephritis inhibits the kidney's role in regulating blood pressure.
Diabetic kidney disease (diabetic nephropathy). High blood sugar levels contribute to scarring of the glomeruli and increase the rate of blood flow through the nephrons.
Focal segmental glomerulosclerosis. In this condition, scarring is scattered among some of the glomeruli. This may be the result of another disease, or it may occur for no known reason.
Infrequently, chronic glomerulonephritis runs in families. One inherited form, Alport syndrome, also might impair hearing or vision.
Glomerulonephritis is associated with certain cancers, such as gastric cancer, lung cancer and chronic lymphocytic leukemia.
Glomerulonephritis affects the ability of nephrons to filter the bloodstream efficiently. The breakdown in filtering results in:
Possible complications of glomerulonephritis include:
Acute kidney failure. Acute kidney failure is the sudden, rapid decline in kidney function, often associated with an infectious cause of glomerulonephritis. The accumulation of waste and fluids can be life-threatening if not treated promptly with an artificial filtering machine (dialysis). The kidneys often resume typical function after recovery.
Chronic kidney disease. Persistent inflammation results in long-term damage and declining function of the kidneys. Chronic kidney disease is generally defined as kidney damage or decreased function for three or more months. Chronic kidney disease may advance to end-stage kidney disease, which requires either dialysis or a kidney transplant.
High blood pressure. Damage to the glomeruli from inflammation or scarring can lead to increased blood pressure.
Nephrotic syndrome. Nephrotic syndrome is a condition in which there is too much blood protein in urine and too little in the bloodstream. These proteins play a role in regulating fluids and cholesterol levels. A drop in blood proteins results in high cholesterol, high blood pressure and swelling (edema) of the face, hands, feet and abdomen. In rare instances, nephrotic syndrome may cause a blood clot in a kidney blood vessel.
There may be no way to prevent some forms of glomerulonephritis. However, here are some steps that might be beneficial:
Kidney biopsy Glomerulonephritis may be identified with tests if you have an acute illness or during routine testing during a wellness visit or an appointment managing a chronic disease, such as diabetes. Tests to assess your kidney function and make a diagnosis of glomerulonephritis include:
reveal signs of poor kidney function, such as red blood cells and proteins that should not be in urine or white blood cells that are a sign of inflammation. There also may be a lack of the expected levels of waste products.
Blood tests. Analysis of blood samples can reveal higher than expected levels of waste products in the bloodstream, the presence of antibodies that may indicate an autoimmune disorder, bacterial or viral infection, or blood sugar levels indicating diabetes.
Imaging tests. If your doctor detects evidence of kidney disease, he or she may recommend imaging tests that may show an irregularity in the shape or size of the kidney. These tests may be an X-ray, an ultrasound exam or a CT scan.
Kidney biopsy. This procedure involves using a special needle to extract small pieces of kidney tissue to look at under a microscope. A biopsy is used to confirm a diagnosis and to assess the degree and nature of tissue damage.
Treatment of glomerulonephritis and your outcome depend on:
Some cases of acute glomerulonephritis, especially those that follow an infection with streptococcal bacteria, might improve on their own and require no treatment. If there's an underlying cause — such as high blood pressure, an infection or an autoimmune disease — treatment will be directed to the underlying cause.
In general, the goal of treatment is to protect your kidneys from further damage and to preserve kidney function.
Kidney failure is the loss of 85% or more of kidney function. Acute kidney failure due to infection-related glomerulonephritis is treated with dialysis. Dialysis uses a device that works like an artificial, external kidney that filters your blood.
End-stage kidney disease is chronic kidney disease that can only be managed by regular kidney dialysis or a kidney transplant.
If you have kidney disease, your doctor might recommend certain lifestyle changes:
Dr Sushrut Fuladi is a well-known Consultant Nephrologist and Renal Transplant Physician with expertise in treating patients of Acute Kidney Injury, Chronic Kidney Disease, Hypertension and Diabetes related renal disorders, and renal replacement therapies.
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