16 results
ANA (Antinuclear Antibody) and ANCA (Antineutrophil cytoplasmic antibodies)
 • Systemic lupus erythematosus
   1. Anti-dsDNA
antibodies) • Systemic ... lupus erythematosus ... drug-induced SLE) • Systemic ... Vasculitis: • ... antibodies #diagnosis #rheumatology
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
causes arthritis ... mucositis - Rash ... purpura: strong sign ... LFT • ESR • ANA ... differential #diagnosis #rheumatology
Causes of Petechial Rash - Differential Diagnosis Algorithm

Pinpoint areas (less than 2 mm) of hemorrhage, which
Causes of Petechial ... (lupus, RA, Sjogren's ... deficiency Work ... cryoglobulins • Skin ... #Petechiae #Rash
Systemic Lupus Erythematosus (SLE) - Diagnosis and Management Summary
 • Epidemiology: 10-180/100,000, Typically Age 20-40, F:M
Systemic Lupus Erythematosus ... Manifestations: Malar rash ... • Immunologic Workup ... : - ANA > ... Evolution: Chronic disease
Aortitis - Differential Diagnosis Framework
Non-Infectious Aortitis:
 • Vasculitides: Giant Cell Arteritis (GCA), Takayasu's arteritis, Cogan's Syndrome,
Nodosa (PAN), ANCA ... associated vasculitis ... Arthritis (RA), Systemic ... lupus erythematosus ... Differential #Diagnosis #rheumatology
Clinical Features of Systemic Lupus (SLE)
General: Fever (50%), Depression, Fatigue (75%), Weight loss (50%)
Eye: Sjögrens (15%)
Skin
Sjögrens (15%) Skin ... Photosensitivity, Butterfly rash ... , Vasculitis, Purpura ... pain (20%) Renal disease ... erythematosus #signs
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
pathophysiologic causes ... Negative IF): • PR3-ANCA ... (C-ANCA): GPA > ... > eGPA • MPO-ANCA ... (P-ANCA): eGPA,
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
SLE (Systemic Lupus ... findings (ANA, ... 3rd Decade Skin ... Diagnosis: • ANCA-associated ... antibodies • (-) ANA
Drug Induced Lupus vs SLE
Drug Induced Lupus (DIL):
 • Epidemiology: -10% of all lupus cases, drug-dependent,
: - ANA > ... Discontinuation of causal ... months to years) Systemic ... : - ANA > ... Evolution: Chronic disease
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
purpura: Strong sign ... , mucositis • Rash ... : ANCA Associated ... causes arthritis ... Differential #Diagnosis #Rheumatology