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Pseudogout


Alternative names

Calcium pyrophosphate deposition disease; CPPD

Definition

Pseudogout is a joint disease that may include intermittent attacks of arthritis .

Causes, incidence, and risk factors

Pseudogout is caused by the collection of calcium pyrophosphate crystals in joints. There may be attacks of joint swelling and pain in the knees, wrists, ankles, and other joints.

This condition primarily affects the elderly and usually has no known cause. However, it can sometimes affect younger patients who have conditions such as acromegaly , ochronosis , thyroid disease , hemochromatosis , Wilson disease , and parathyroid disease, which are known to increase risk.

Pseudogout can be initially be misdiagnosed as gouty arthritis, rheumatoid arthritis , or osteoarthritis because the symptoms are similar to those of these conditions.

Careful workup, with analysis of crystals found in joints, should ultimately lead to the correct diagnosis. Fortunately, because most conditions involving joint pain are treated by the same medicines, early misdiagnosis does not necessarily result in inappropriate treatment. Such treatment often includes steroids and nonsteroidal anti-inflammatory drugs (NSAIDs),

Symptoms

  • Attacks of joint pain and fluid accumulation in the joint, leading to joint swelling
  • No symptoms between attacks
  • Chronic arthritis

Signs and tests

  • Culture of joint fluid reveals white blood cells and calcium pyrophosphate crystals.
  • Joint X-rays may show joint damage, calcification of cartilage, and chondrocalcinosis (calcium deposits in joint spaces).

Treatment

Treatment may involve joint aspiration to relieve pressure within the joint caused by fluid buildup. A needle is placed into the joint and fluid is removed (aspirated).

Steroid injections may be helpful to treat severely inflamed joints. A course of oral steroids is sometimes used when multiple joints are inflamed.

Nonsteroidal anti-inflammatory medications (NSAIDS) may help ease the pain of acute attacks. Colchicine may be useful in some people.

Expectations (prognosis)

The probable outcome is good with treatment.

Complications

Permanent joint damage can occur without treatment.

Calling your health care provider

Call for an appointment with your health care provider if you have attacks of joint swelling and joint pain .

Prevention

There is no known way to prevent this disorder. However, treatment of a lnown predisposing condition may reduce the severity of pseudogout and may in effect prevent it from developing in unaffected patients.

Update Date: 11/11/2002

Ajay Nirula, M.D., Ph.D., Department of Rheumatology, University of California San Francisco, San Francisco, CA. Review provided by VeriMed Healthcare Network.

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Last updated: Tue, 06 Jan 2009 00:20:03 GMT
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