114 results
Pulmonary Renal Syndromes and Mimics - Differential Diagnosis Framework
Diffuse alveolar hemorrhage + rapidly progressive glomerulonephritis
90%:
 -
- Anti-GBM Disease ... anti-GBM) 10%: - Low Complement ... Levels: SLE, Cryoglobulinemic ... - Normal Complement ... , Behcet's Disease
Autoantibodies and their Disease Associations
ANA - Non-specific; common in SLE, autoimmune hepatitis
Anti-CCP, Rheumatoid factor - RA
Anti-dsDNA
Non-specific; common in SLE ... RA Anti-dsDNA - SLE ... - Drug-induced SLE ... c-ANCA - Vasculitis ... granulomatosis p-ANCA - Vasculitis
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
(Granulomatous disease ... atherosclerotic disease ... most important diseases ... against MPO • Complement ... , and SLE) • Urinalysis
Effect of Selected Diseases on Complement Levels - C3, C4
 • SLE C3 ↓ C4 ↓↓
Effect of Selected Diseases ... on Complement Levels ... - C3, C4 • SLE ... • Infection eg SBE ... ThePeanutKidney #Complement
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
staining): • Low Complement ... Idiopathic • Normal Complement ... involvement: Anti-GBM Disease ... Glomerulonephritis #Vasculitis ... differential #diagnosis #algorithm
Drug Induced Lupus vs SLE
Drug Induced Lupus (DIL):
 • Epidemiology: -10% of all lupus cases, drug-dependent,
90% - Low complement ... cutaneous-DIL • Evolution ... 80% - Low complement ... • Evolution: ... Chronic disease
Systemic Lupus Erythematosus (SLE) - Diagnosis and Management Summary
 • Epidemiology: 10-180/100,000, Typically Age 20-40, F:M
Erythematosus (SLE ... are evocative of SLE ... 80% - Low complement ... • Evolution: ... Chronic disease
Petechial/Purpuric Rashes- THE ALGORITHMIC APPROACH 

These rashes can be especially challenging and are
associated with devastating differential
Purpuric Rashes- THE ALGORITHMIC ... ; however, an algorithmic ... diseases secondary ... require emergent evaluation ... disseminated gonococcal disease
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 ... • Mesenteric vasculitis ... inflammation Cutaneous Vasculitis ... RNP antibodies, Complement
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
Malar rash • SLE ... infection • Lyme disease ... Hypersensitivity vasculitis ... IBD • RA • SLE ... Antiphospholipid-antibody syndrome • Vasculitis