11 results
Pathophysiology of Hypocomplementemic Urticarial Vasculitis

C1q/anti-C1q antibiody ->
Immune Complex Formation - Complement Pathway Activation (C3a and C5a)
Pathophysiology ... of Hypocomplementemic ... Complex Formation - Complement ... TerrierBen #Hypocomplementemic ... #HUV #Pathophysiology
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
Types: • Type ... Cryoglobulins: - Single monoclonal ... - Composed of monoclonal ... • Low serum C4 complement ... #classification
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
Hypersensitivity Types ... antigen, leading to complement ... Complement activation ... #Classification ... #Pathophysiology
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
Vasculitis and Vasculitides ... often involved • Hypocomplementemic ... Urticaria and hypocomplementemia ... against MPO • Complement ... #rheumatology #classification
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
three primary pathophysiologic ... staining): • Low Complement ... Idiopathic • Normal Complement ... Glomerulonephritis #Vasculitis ... differential #diagnosis #algorithm
Cold Agglutinin Disease

3 Types of Cold Sensitive Antibodies:
  1. Cold Agglutinins (CAD)
  2. Donath-Landsteiner
Agglutinin Disease 3 Types ... Cryoglobulins (Vasculitic ... - Idiopathic monoclonal ... malignancy (CLL) - Monoclonal ... temperatures by fixing complement
Recommended initial testing for patients being evaluated for glomerular disease 

24-hour urine collection - Quantify proteinuria.
chains - Screen for monoclonal ... for detection of monoclonal ... or alternative complement ... for ANCA-related vasculitis ... cryoglobulinemias (types
Recommended initial testing for patients being evaluated for glomerular disease
1) 24-hour urine collection - Quantify proteinuria.
or alternative complement ... chains - Screen for monoclonal ... for detection of monoclonal ... for ANCA-related vasculitis ... cryoglobulinemias (types
IGG-4 RELATED DISEASE

WHAT?
 • A chronic, immune-mediated fibroinflammatory disease with tumefactive infiltration of IgG4+ plasma cells
dysfunction PATHOPHYSIOLOGY ... • Pancreas: Type ... aortitis, mimics vasculitis ... - ↑ IgE, ↓ complement ... • Classification
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
anti-Smith Ab, low complements ... Skin Disease Classification ... ANCA-associated vasculitis ... Kikuchi disease • Type-I ... RNP antibodies, Complement