4 results
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
TB • LTBI is diagnosed ... result with no clinical ... • History of BCG ... False-negative TST result may ... immunocompromised (e.g
Rheumatology Workup - Laboratories Studies in Rheumatic Diseases

• Septic arthritis - Gram stain and culture of
inflammatory disease (e.g ... Chemistry profile (e.g ... (to support a diagnosis ... of reactive arthritis ... ANA and RF (if clinical
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
) Suspect: Clinical ... Differential Diagnosis ... • Malignancy (e.g ... Endocrine disorders (e.g ... extremity edema, active
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
precipitate in vitro at ... • They can activate ... Syndrome: • Clinical ... Labs/Diagnosis: ... tissue disorder (e.g