26 results
Causes of Hypocomplementemia - CHAMPS Mnemonic
C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis
H - Heavy Chain deposition
Causes of Hypocomplementemia ... glomerulonephritis (>90%) S - Systemic ... @AnnKumfer #Hypocomplementemia ... #Low #Complement
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 and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
often involved • Hypocomplementemic ... Urticaria and hypocomplementemia ... central nervous system ... against MPO • Complement ... vasculitis, and SLE
Systemic Lupus Erythematosus (SLE): Pathogenesis

 • Genetic factors (Mutations in HLA- DR2/HLA-DR3 genes, complement genes, cytokine
Systemic Lupus Erythematosus ... (SLE): Pathogenesis ... HLA-DR3 genes, complement ... self-antigens, activating complement ... Erythematosus #SLE
Systemic Lupus Erythematosus (SLE) - Diagnosis and Management Summary
 • Epidemiology: 10-180/100,000, Typically Age 20-40, F:M
Systemic Lupus Erythematosus ... (SLE) - Diagnosis ... are evocative of SLE ... 80% - Low complement ... #lupus #Systemic
Drug Induced Lupus vs SLE
Drug Induced Lupus (DIL):
 • Epidemiology: -10% of all lupus cases, drug-dependent,
Induced Lupus vs SLE ... 90% - Low complement ... months to years) Systemic ... 80% - Low complement ... #comparison #table
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
Diagnosis: • Systemic ... diseases, such as SLE ... Presentation: Systemic ... Elevated AST ALT • Hypocomplementemia ... Vasculitis) • Hypocomplementemic
Causes of ileitis beyond Crohn’s disease and infections include systemic disorders -spondyloarthropathies, vasculitides, ischemia, and amyloidosis
infections include systemic ... See below for table ... helpful paper complements ... #Differential #Table
IgG4-Related Disease
Clinical history:  Man, 60 years, multiorgan involvement, unique or multiple inflammatory pseudotumor
4 phenotypes:
 •
female, asian • Systemic ... rheumatoid factor), ± hypocomplementemia
Antinuclear antibodies and Systemic lupus
Anti-dsDNA	60-80%	Association with disease activity (when with Farr assay) and lupus nephritis. Can
antibodies and Systemic ... Anti-Ribo-P 5-15% If SLE ... higly specific for SLE ... autoantibodies #Systemic ... #rheumatology #table