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Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
Urticaria and hypocomplementemia ... inflammation Others: • Lupus ... such as systemic lupus ... against MPO • Complement ... vasculitis, and SLE
Causes of Hypocomplementemia - CHAMPS Mnemonic
C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis
H - Heavy Chain deposition
Causes of Hypocomplementemia ... S - Systemic Lupus ... @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
Drug Induced Lupus vs SLE
Drug Induced Lupus (DIL):
 • Epidemiology: -10% of all lupus cases, drug-dependent,
Drug Induced Lupus ... Lupus (DIL): ... 90% - Low complement ... 80% - Low complement ... management of 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 ... , oral ulcers, Lupus ... 80% - Low complement ... #lupus #Systemic
SLICC SLE Diagnostic Criteria - Systemic Lupus Erythematosus
Clinical and Immunologic Criteria

CLINICAL CRITERIA
 - ACUTE CUTANEOUS LUPUS
SLICC SLE Diagnostic ... Criteria - Systemic Lupus ... ACUTE CUTANEOUS LUPUS ... anticoagulant - Low complement ... #Rheumatology #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 ... #Systemic #Lupus ... Erythematosus #SLE
Clinical Manifestations of Systemic Lupus Erythematosus (SLE)

#Systemic #Lupus #Erythematosus #SLE #Manifestations #Signs #Symptoms #Rheumatology #Diagnosis
Manifestations of Systemic Lupus ... Erythematosus (SLE ... ) #Systemic #Lupus ... Erythematosus #SLE
Effect of Selected Diseases on Complement Levels - C3, C4
 • SLE C3 ↓ C4 ↓↓
Selected Diseases on Complement ... Levels - C3, C4 • SLE ... • Infection eg SBE ... ThePeanutKidney #Complement
EULAR/ACR Classification Criteria for Systemic Lupus Erythematosus
Clinical Domains:
 • Constitutional domain: Fever
 • Cutaneous domain: Non-scarring
Criteria for Systemic Lupus ... Acute cutaneous lupus ... anticoagulant • Complement ... Classification #Criteria #SLE ... #Systemic #Lupus