20 results
Pathophysiology of Hypocomplementemic Urticarial Vasculitis

C1q/anti-C1q antibiody ->
Immune Complex Formation - Complement Pathway Activation (C3a and C5a)
Pathophysiology of Hypocomplementemic ... Urticarial Vasculitis ... Complex Formation - Complement ... Formation -> Vasculitis ... TerrierBen #Hypocomplementemic
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
Summary table of ... reactions. ... antigens, leading to complement ... they activate complement ... #table #classification
Causes of Hypocomplementemia - CHAMPS Mnemonic
C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis
H - Heavy Chain deposition
Causes of Hypocomplementemia ... glomerulonephritis, type ... 1 (50%-80%), type ... @AnnKumfer #Hypocomplementemia ... #Low #Complement
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
Hypersensitivity Types ... antigen, leading to complement ... Complement activation ... Allergy #Diagnosis #Reactions ... #Table
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
Vasculitis and Vasculitides ... often involved • Hypocomplementemic ... Urticaria and hypocomplementemia ... disease, drug reactions ... against MPO • Complement
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
Types: • Type ... arthritis) • Types ... • Type III Often ... • Low serum C4 complement ... • Vasculitis
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
Vasculitis - Differential ... When to Consider Vasculitis ... disease, drug reactions ... Elevated AST ALT • Hypocomplementemia ... ) • Hypocomplementemic
Type II Hypersensitivity: Pathogenesis and clinical findings
Definition: When antigens bind to the body's cell surfaces, forming
Type II Hypersensitivity ... antibody-mediated immune reaction ... activates the complement ... cell surfaces #Type2 ... #Type2 #HypersensitivityReaction
Causes of ileitis beyond Crohn’s disease and infections include systemic disorders -spondyloarthropathies, vasculitides, ischemia, and amyloidosis
spondyloarthropathies, vasculitides ... See below for table ... helpful paper complements ... #Differential #Table
Shock Classification
Shock Definition: State of cellular and tissue hypoxia due to: reduced oxygen delivery, increased oxygen
• Most common type ... severe IgE-mediated reaction ... Classification #Types ... warm #wet #dry #table