be beside yourself. C2 If you are beside yourself with a particular feeling or emotion, it is so strong that it makes you almost out of control: He was beside himself with grief when she died. (Definition of âbe beside yourselfâ from the Cambridge Advanced Learnerâs Dictionary & Thesaurus Â© Cambridge University Press)
Rheumatoid Factor Test. The rheumatoid factor is an antibody present in the blood of many patients with rheumatoid arthritis. Doctors measure the level of rheumatoid factor by performing a blood test. A positive rheumatoid factor test means that the patientâs level of rheumatoid factor in their blood is considered high.
1 A positive ANA test means autoantibodies are present. 2  By itself, a positive ANA test does not indicate the presence of an autoimmune disease or the need for therapy. 3  Some medications cause a positive ANA. By itself, a positive ANA test does not indicate the presence of an autoimmune disease or the need for therapy. 2  Some medications cause a positive ANA. 3  Tell your doctor all prescription, over-the-counter and street drugs you take.