My sister has been having strange arthritis symptoms in addition to shooting pains in her left arm and leg. After weeks of visits with neurology specialists she was sent to a rheumatologist. Because of my diagnosis the doctor tested her for HLA-B27 and she was positive. We're not sure exactly what that means yet. She could have Reactive Arthritis or she could simply have a virus that is causing temporary joint inflammation. She is in a lot of pain and it makes me sad for her. It is so strange that within the same year we are both discovering this gene and the arthritis that comes with it.