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In addition to X-rays, CT scans, and/or MRIs, your doctor might order blood tests to help rule out infection, types of arthritis other than osteoarthritis, cancer, and other problems. Most people with straightforward signs and symptoms of arthritis may not require more than an X-ray. However, your physician will make that determination in order to help ensure that a more serious underlying disorder does not go undiagnosed and untreated.
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