Alport syndrome is an inherited disorder that damages tiny blood vessels in the kidneys.
Alternative Names of Alport's Syndrome are: Hereditary nephritis; Hematuria - nephropathy - deafness; Hemorrhagic familial nephritis; hereditary deafness and nephropathy.
Complications of Alport's Syndrome
Chronic renal failure
Decrease or loss of vision
End-stage renal disease
Causes of Alport's Syndrome
Alport syndrome is an inherited form of kidney inflammation (nephritis). It is caused by a mutation in a gene for a protein in connective tissue, called collagen. The disorder is uncommon, and most often affects males. Women can transmit the gene for the disorder to their children, even if they have no symptoms.
Risk factors include:
End-stage kidney disease in male relatives
Family history of Alport syndrome
Hearing loss before age 30
Signs & Symptoms of Alport's Syndrome
The disorder damages the tiny blood vessels in the kidneys, called glomeruli that filter wastes. At first, there are no symptoms. However, progressive destruction of the glomeruli leads to blood in the urine and may decrease the effectiveness of the kidney's filtering system. There is a progressive loss of kidney function and a build-up of fluids and waste products in the body. In women, the disorder is usually mild, with minimal or no symptoms. In men, the symptoms are more severe and get worse faster.
Abnormal urine color
Ankle, feet, and leg swelling
Blood in the urine
Decrease or loss of vision, more common in males
Loss of hearing, more common in males
Swelling around the eyes
The condition can progress to end-stage renal disease (ESRD) at an early age (between adolescence and age 40).
Note: There may be no symptoms in some cases. Symptoms of chronic kidney failure or heart failure may be present or may develop.
Diagnosis of Alport's Syndrome
Changes to the eye, including the fundus (posterior inner part of eye), lens, cataracts, or lens protrusion (lenticonus)
Elevated blood pressure
Tiny amounts of blood in the urine (microscopic hematuria)
The following tests may be done:
Urinalysis shows blood, protein, and other abnormalities.
BUN and creatinine are elevated.
Red blood cell count, hematocrit may decrease.
Audiometry may show nerve deafness.
Renal biopsy shows chronic glomerulonephritis with changes typical of Alport syndrome.
Treatments of Alport's Syndrome
The goals of treatment include monitoring and controlling progression of the disease and treating the symptoms. Most important is to strictly control blood pressure.
Treatment of chronic kidney failure may become necessary. This can include dietary modifications, fluid restriction, and other treatments. Ultimately, chronic kidney failure progresses to end-stage kidney disease, requiring dialysis or transplantation.
Surgical repair of cataracts (cataract extraction), or repair of the anterior lenticonus in the eye may be needed.
Loss of hearing is likely to be permanent. Counseling and education to increase coping skills can be helpful. Learning new skills such as lip reading or sign language may be of some benefit. Hearing aids are helpful. Young men with Alport syndrome should use hearing protection in noisy environments.
Genetic counseling may be recommended because of the inherited pattern of the disorder.
Prevention of Alport's Syndrome
This uncommon disorder is inherited. Awareness of risk factors, such as a family history of the disorder, may allow the condition to be detected early.
When to seek Medical Advice
Call for an appointment with your health care provider if your symptoms suggest Alport syndrome, or if you have a family history of Alport syndrome and you are planning to have children.
Call your health care provider if your urine output decreases or stops or if you see blood in your urine. This may be a symptom of chronic kidney failure.