Rheumatoid factor (RF)

Service Description

Biomarker: RF Sample: BLOOD Results: 4 HRS Phlebotomy fee: £10 RF test measures the presence and level of rheumatoid factor, which is an autoantibody produced by the immune system. RF is an antibody that is produced by the body's immune system in response to inflammation. RF is present in the blood of about 80% of people with rheumatoid arthritis (RA). However, RF can also be present in people with other conditions, such as Sjögren's syndrome, lupus, and chronic infections. Therefore, the RF test is often used in conjunction with other clinical assessments, such as a physical examination, medical history, imaging studies, and other laboratory tests, to aid in the diagnosis and monitoring of RA.