Vasculitis is a general term that refers to inflammation of blood vessels. When blood vessels become inflamed, they may become weakened, leak, stretch, and either increase in size or become narrow -- even to the point of closing entirely.
Vasculitis can affect people of all ages, but there are types of vasculitis that occur in certain age groups more often than others.
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Some of the many forms of vasculitis may be restricted to particular organs. Examples include vasculitis that affects only the skin, eye, brain, or certain internal organs. There are also types of vasculitis that may affect many organ systems at the same time. Some of these generalized forms may be quite mild and may not require treatment. Others may be severe, affecting critical organs.
In many cases, the cause of vasculitis is unknown. In a few cases, however, the origins may be traced to recent or ongoing infections, such as those caused by certain viruses. Occasionally, an allergic reaction to a medication may trigger vasculitis.
Vasculitis can sometimes develop after an infection has come and gone. Usually in these cases, the infection triggers an abnormal response in the person's immune system, damaging the blood vessels. Vasculitis also may be related to other diseases of the immune system that the person has had for months or years. For example, it could be a complication of rheumatoid arthritis, lupus, or Sjögren's syndrome.
An enormous number of vasculitis symptoms are possible because any organ system may be involved. If the skin is involved, there may be a rash. If nerves suffer loss of blood supply, there may initially be an abnormal sensation followed by a loss of sensation.
Vasculitis in the brain may cause a stroke, or in the heart, may result in a heart attack. Inflammation in the kidney could result in abnormalities noted on urine tests and can lead to progressive kidney failure.
Sometimes the symptoms may be as general as fever, loss of appetite, weight loss, and loss of energy. If you suffer any unusual symptoms, see your doctor.
The diagnosis of vasculitis is based on a person's medical history, current symptoms, complete physical exam, and the results of specialized lab tests. A doctor can test for blood abnormalities, which can occur when vasculitis is present. These abnormalities include:
A high white blood cell count
A high platelet count
Signs of kidney or liver problems
Signs of an allergic reaction
Blood tests also can identify immune complexes or antibodies (ways the body fights off what it thinks is a threat) that cause vasculitis. Additional tests may include X-rays, tissue biopsies, blood vessel, and heart scans.
Treatment for vasculitis depends entirely upon diagnosis and the affected organs. When vasculitis is the result of an allergic reaction, it may go away on its own and not require treatment. In other instances, when critical organs such as the lungs, brain, or kidneys are involved, aggressive and timely treatment is necessary.
Treatment generally consists of corticosteroid medications (steroids). Chemotherapeutic drugs (such as those used to treat cancer) are also used, but in doses considerably lower than people with cancer may receive. The goal of this type of chemotherapy is to suppress the abnormal immune response that has led to blood vessel damage.