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    Rheumatoid Factor Positive

    RF positive

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    Assessment & Plan (short)

    # Rheumatoid Factor Positive
    RF is a nonspecific biomarker, with ~10% of population >65 y.o being RF+. Other than true rheumatoid arthritis as a cause of RF+, common etiologies include infection (Hep C, osteomyelitis, SBE, HIV, Syphilis), Cryoglobulinemia (~100%), autoimmune/inflammatory (Sjogrens (20-30%), SLE (15-25%), Scleroderma (10-20%), Polymyositis/Dermatomyositis (5-10%), sarcoidosis), IPF and cirrhosis.
    - CCP if concerned for RA, additiona dx per clinical scenario

    Organ systems
    • Rheumatology
    Medical field
    • Internal medicine
    Setting
    • Inpatient
    Author
    Eric Lee
    Page info

    Originally created: March 3, 2020 by Eric Lee

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    References
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