10 results
ANCA-Associated Vasculitis
A group of necrotizing, small-vessel vasculitis without immune complex deposition. Complement levels are normal due
associated with PR3 ... involvement - PR3 ... 75-90%, rarely PR3 ... disease - MPO>PR3 ... #PANCA #MPO #PR3
ANA (Antinuclear Antibody) and ANCA (Antineutrophil cytoplasmic antibodies)
 • Systemic lupus erythematosus
   1. Anti-dsDNA
polyangiitis - MPO>PR3 ... polyangiitis - PR3 ... involvement - PR3 ... Churg-Strauss) - MPO>PR3 ... disease - MPO>PR3
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
proteinase 3 (PR3 ... in >90%, MPO > PR3 ... Granulomas - MPO > PR3 ... 80% (80-90% have PR3 ... proteinase 3 (PR3
ANCA Associated Vasculitis (AAV) - Auto-antibodies and Differential Diagnosis

MPA → usually p-ANCA
GPA → usually c-ANCA
EGPA →
ANCA Associated ... EGPA → ANCA in ... 40-50% P-ANCA ... (MPO) C-ANCA ( ... PR3) X-ANCA (elastase
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
Negative IF): • PR3 ... -ANCA (C-ANCA): ... > eGPA • MPO-ANCA ... (P-ANCA): eGPA, ... differential #diagnosis #algorithm
Frequency of ANCA Positivity in Different Conditions
ANCA-Associated Vasculitis
 • GPA - PR3-ANCA 75%, MPO-ANCA 20%, 5%
Vasculitis • GPA - PR3 ... • MPA - PR3-ANCA ... • EGPA - PR3- ... positivity for MPO and PR3 ... sensitivity #MPO #PR3
A System for Vasculitides 

#Diagnosis #IM #Rheum #Vasculitis #Small #Medium #Large #Vessel #Size #Classification #ANCA #Differential
#Vessel #Size #Classification ... #ANCA #Differential ... #Algorithm #Ddxof
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
Pauci Immune (ANCA ... proteinase 3 (PR3 ... in > 30 / MPO > PR3 ... hemoptysis, MPO > PR3 ... 90 percent have PR3
Acute Kidney Injury (AKI) - Differential Diagnosis Framework
Pre-Renal:
 • Hypovolemia, Cardiorenal, Distributive Shock, HRS, Hypercalcemia, Renal
Diagnosis Framework Pre-Renal ... Vasculitis • GN: ANCA ... nephrology #causes #algorithm
Subtypes of Serum Proteins

Pre-albumin (Transthyretin)
Albumin
Globulins
 • Alpha-1: Alpha-1 antitrypsin, Serum amyloid A, Ceruloplasmin, Corticosteroid-binding globulin (Transcortin),
Serum Proteins Pre-albumin ... Proteins #Subtypes #algorithm ... #classification