DIFFERENTIAL DIAGNOSIS FOR A POSITIVE RHEUMATOID FACTOR (RF)

Rheumatologic Diseases

     Rheumatoid Arthritis

     Systemic Lupus Erythematosus (SLE)

     Sjogren's Syndrome

     Felty's Syndrome

Pulmonary Fibrosis

Infections

     Infectious Mononucleosis

     Viral Hepatitis

     Rubella

     Viral Influenza

     Leprosy

     Syphilis

     Lyme Disease

     Malaria

     Tuberculosis

     Endocarditis

Systemic Diseases

     Primary Biliary Cirrhosis

     Sarcoidosis

     Multiple Myeloma

     Mixed Cryoglobulinemia

Malignancy

Healthy Persons Without Underlying Disease