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diagnosis rheumatology classification differential allergy champs cryoglobulinemia cryoglobulins erythematosus glomerulonephritis hematology huv hypersensitivity hypocomplementemic igg4 low management mnemonic progressive rapidly
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
Causes of Hypocomplementemia - CHAMPS Mnemonic C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis H - Heavy Chain deposition
Causes of Hypocomplementemia ... glomerulonephritis, type ... 1 (50%-80%), type ... S - Systemic Lupus ... #Low #Complement
Rapidly Progressive Glomerulonephritis (RPGN) RPGN has three primary pathophysiologic causes differentiated by immunofluorescence Immune Complex Mediated (granular staining):
three primary pathophysiologic ... staining): • Low Complement ... Post-strep GN, Lupus ... Glomerulonephritis #Vasculitis ... differential #diagnosis #algorithm
Vasculitis and Vasculitides - Differential Diagnosis Framework When to Consider Vasculitis: • Purpura, ischemic skin lesions •
often involved • Hypocomplementemic ... Urticaria and hypocomplementemia ... inflammation Others: • Lupus ... such as systemic lupus ... against MPO • Complement
Hypersensitivity Types and Their Mechanisms Type I - lgE - Soluble antigen - Allergen-specific lgE antibodies bind
Hypersensitivity Types ... antigen, leading to complement ... Complement activation ... , and systemic lupus ... Classification #Pathophysiology
Cryoglobulinemia Summary Cryoglobulins: • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
Types: • Type ... • Type III Often ... • Low serum C4 complement ... • Vasculitis ... (e.g. systemic lupus
SLE (Systemic Lupus Erythematosus) Suspect: Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
anti-Smith Ab, low complements ... ANCA-associated vasculitis ... Kikuchi disease • Type-I ... • Mesenteric vasculitis ... RNP antibodies, Complement
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
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