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The Daily Insight

What mimics reactive arthritis?

Author

Jessica Cortez

Updated on April 02, 2026

A variety of other rheumatic and infectious diseases may cause joint inflammation and additional symptoms that can resemble those seen in reactive arthritis. These disorders include rheumatoid arthritis, adult-onset Still’s disease, osteoarthritis, gout and Lyme disease.

What is another name for reactive arthritis?

Reactive arthritis, formerly known as Reiter’s syndrome, is a form of inflammatory arthritis that develops in response to an infection in another part of the body (cross-reactivity).

Does reactive arthritis show on X ray?

X-rays of your low back, pelvis and joints can indicate whether you have any of the characteristic signs of reactive arthritis. X-rays can also rule out other types of arthritis.

What is Rea (reactive arthritis)?

Reactive arthritis (ReA) is an infectious disease. A healthy but genetically predisposed individual develops it after a suitable triggering infection. Most commonly the initial infection has affected the digestive or the urogenital tract and the terms enteroarthritis or uroarthritis are used, respectively.

What is reactive arthritis (Reiter’s syndrome)?

Previously, reactive arthritis was sometimes called Reiter’s syndrome, which was characterized by eye, urethra and joint inflammation. Reactive arthritis isn’t common.

What are the extra-articular manifestations of reactive arthritis?

Other extra-articular manifestations include cardiac conduction abnormalities and aortic regurgitation. In reactive arthritis, there is joint inflammation, bone proliferation, periostitis, and enthesitis. Reactive arthritis occurs following infections including 5-8:

What is the most common age to get reactive arthritis?

Age. Reactive arthritis occurs most frequently in adults between the ages of 20 and 40. Sex. Women and men are equally likely to develop reactive arthritis in response to foodborne infections. However, men are more likely than are women to develop reactive arthritis in response to sexually transmitted bacteria.