110 results
Autoantibodies in Rheumatology
 • Lupus (SLE): ANA (anti-nuclear antibody), dsDNA (double-stranded DNA), Anti-Smith, Anti-Ro (SSA) and
Anti-Smith, Anti-Ro ... Syndrome: Anti-Ro ... Polymerase Ill • ANCA ... Vasculitis: P-ANCA ... perinuclear), C-ANCA
ANA (Antinuclear Antibody) and ANCA (Antineutrophil cytoplasmic antibodies)
 • Systemic lupus erythematosus
   1. Anti-dsDNA
Antibody) and ANCA ... Anti-Ro/SSA ... 80-90%) > MPO - ANCA ... MPO: 75-80% - ANCA ... Antinuclear #Antibody #ANCA
Autoantibodies and their Disease Associations
ANA - Non-specific; common in SLE, autoimmune hepatitis
Anti-CCP, Rheumatoid factor - RA
Anti-dsDNA
Disease Associations ANA ... SLE Anti-SSA (Ro ... Graves' disease c-ANCA ... granulomatosis p-ANCA
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
laboratory findings (ANA ... lesions • Anti-Ro ... Diagnosis: • ANCA-associated ... • Anti-Smith, Ro ... + (+) anti-Ro/SSA
Weakness - Differential Diagnosis Framework

Approach To Weakness:
 • Non-neuromuscular disorder (Cardiac, pulmonary etc)
 • CNS ->
Serology: - Anti-Ro ... - (Vasculitis) ANCA
ANCA-Associated Vasculitis
A group of necrotizing, small-vessel vasculitis without immune complex deposition. Complement levels are normal due
ANCA-Associated ... - C-ANCA pattern ... antibody) - P-ANCA ... Hydralazine-induced ANCA ... @AnnKumfer #ANCA
ANCA Associated Vasculitis (AAV) - Auto-antibodies and Differential Diagnosis

MPA → usually p-ANCA
GPA → usually c-ANCA
EGPA →
ANCA Associated ... MPA → usually p-ANCA ... EGPA → ANCA in ... 40-50% P-ANCA ... (MPO) C-ANCA (
Pulmonary Renal Syndrome

Definition: Diffuse alveolar hemorrhage + Glomerulonephritis
Presentation (Pulmonary and renal manifestations can occur weeks apart):
Pauci-Immune: - ANCA-positive ... polyangiitis) - ANCA-negative ... testing: anti-ANCA ... , anti-GBM ab, ANA
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
VESSEL VASCULITIS: ANCA ... Associated - ANCA ... proteinase 3 (PR3-ANCA ... Granulomas - ANCA ... Granulomas - ANCA
Approach to managing Glomerulonephritis (GN) in children. 

ANCA, antineutrophil cytoplasmic antibodies; c-ANCA, cytoplasmic antineutrophil cytoplasmic antibodies;
ANCA, antineutrophil ... antibodies; c-ANCA ... hypertension; p-ANCA