93 results
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
staining): • Low Complement ... Post-strep GN, Lupus ... involvement: Anti-GBM Disease ... Glomerulonephritis #Vasculitis ... differential #diagnosis #algorithm
Small Vessel Vasculitides
 • Granulomatosis with polyangiitis - Granulomatous manifestations (e.g., nasal crusting, destructive sinusitis, pulmonary
Small Vessel Vasculitides ... Interstitial lung disease ... Cryoglobulinemic vasculitis ... viruses. systemic lupus ... syndrome • IgA vasculitis
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
inflammation Others: • Lupus ... (Granulomatous disease ... such as systemic lupus ... atherosclerotic disease ... against MPO • Complement
Classification of Vasculitis 
Vasculitis of large vessels 
 - Arteritis temporalis (giant-cell arteritis) 
 - Takayasu
Classification of Vasculitis ... Vasculitis of ... - Kawasaki disease ... and infectious diseases ... - systemic lupus
Pulmonary Renal Syndromes and Mimics - Differential Diagnosis Framework
Diffuse alveolar hemorrhage + rapidly progressive glomerulonephritis
90%:
 -
ANCA Associated Vasculitis ... - Anti-GBM Disease ... anti-GBM) 10%: - Low Complement ... - Normal Complement ... , Behcet's 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
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 ... 80% - Low complement ... management of SLE • Evolution ... : Chronic disease
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 ... management of SLE • 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
Seronegative Inflammatory Arthritis - Differential Diagnosis
 • Seronegative Rheumatoid Arthritis 
 • Infectious Arthritis: Viral, Bacterial,
Systemic Rheumatic Disease ... : Systemic Lupus ... Erythematous, Systemic Vasculitis ... Sclerosis, Sjogren's Disease ... Sarcoidosis, Still's Disease