DIFFERENTIAL DIAGNOSIS FOR A POSITIVE RHEUMATOID FACTOR (RF)
Rheumatologic Diseases
Systemic Lupus Erythematosus (SLE)
Felty's Syndrome
Pulmonary Fibrosis
Infections
Rubella
Viral Influenza
Leprosy
Lyme Disease
Malaria
Systemic Diseases
Malignancy
Healthy Persons Without Underlying Disease