5 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 ... Vasculitis #HUV #Pathophysiology
IgG4-Related Disease
Clinical history:  Man, 60 years, multiorgan involvement, unique or multiple inflammatory pseudotumor
4 phenotypes:
 •
IgG4-Related Disease ... pseudotumor 4 phenotypes ... rheumatoid factor), ± hypocomplementemia ... #Related #Disease ... diagnosis #management #phenotypes
IGG-4 RELATED DISEASE

WHAT?
 • A chronic, immune-mediated fibroinflammatory disease with tumefactive infiltration of IgG4+ plasma cells
IGG-4 RELATED DISEASE ... infiltration of IgG4 ... dysfunction PATHOPHYSIOLOGY ... lesions - IgG4 ... - ↑ IgE, ↓ complement
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
antigen, leading to complement ... Type Ill - IgG and ... Complement activation ... Enzymes released ... Classification #Pathophysiology
Type II Hypersensitivity: Pathogenesis and clinical findings
Definition: When antigens bind to the body's cell surfaces, forming
antigen-surface complex" is created ... autoimmune antibodies (IgG ... activates the complement ... Allergy #Immunology #pathophysiology