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EULAR/ACR Classification Criteria for Systemic Lupus Erythematosus
Clinical Domains:
 • Constitutional domain: Fever
 • Cutaneous domain: Non-scarring
Criteria for Systemic Lupus ... Acute cutaneous lupus ... or pericardial effusion ... Class II or V lupus ... anticoagulant • Complement
Constrictive Pericarditis on POCUS Echocardiogram - Apical 3-Chamber View

Young Lupus patient admitted to hospital new onset
Pericarditis on POCUS ... View Young Lupus ... could pinpoint the cause ... has pericardial effusion ... Lupus pericarditis
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
pathophysiologic causes ... staining): • Low Complement ... Post-strep GN, Lupus ... Idiopathic • Normal Complement
Constrictive Pericarditis on POCUS Echocardiogram - Subcostal View

Young Lupus patient admitted to hospital new onset HFpEF.
Pericarditis on POCUS ... View Young Lupus ... could pinpoint the cause ... has pericardial effusion ... Lupus pericarditis
Drug Induced Lupus vs SLE
Drug Induced Lupus (DIL):
 • Epidemiology: -10% of all lupus cases, drug-dependent,
Drug Induced Lupus ... cases, drug-dependent ... 90% - Low complement ... Discontinuation of causal ... 80% - Low complement
Causes of Hypocomplementemia - CHAMPS Mnemonic
C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis
H - Heavy Chain deposition
Causes of Hypocomplementemia ... S - Systemic Lupus ... Hypocomplementemia #Low #Complement
Hemorrhagic Pericardial Effusions (Hemopericardium)- Differential Diagnosis Framework

IATROGENIC DISEASE
Secondary to invasive cardiac procedures

NONIATROGENIC
• Malignancy (e.g., metastatic spread:
Hemorrhagic Pericardial Effusions ... tuberculous pericardial effusions ... OTHER RARE CAUSES ... induced • MCTD, Lupus ... #Pericardial #Effusion
Systemic Lupus Erythematosus (SLE) - Diagnosis and Management Summary
 • Epidemiology: 10-180/100,000, Typically Age 20-40, F:M
Systemic Lupus Erythematosus ... , oral ulcers, Lupus ... Positive in 60-80% of cases ... 80% - Low complement ... Lupusreference #SLE #lupus
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
SLE (Systemic Lupus ... anti-Smith Ab, low complements ... Acute cutaneous lupus ... Lungs: • Pleural effusions ... RNP antibodies, Complement
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
Allergen-specific lgE causes ... antigens, leading to complement ... they activate complement ... glomerulonephritis, Systemic lupus