18 results
Vasculitis Involving the Skin - Differential Diagnosis Framework

Primary: 50% Cutaneous Vasculitis: Leukocytoclastic Vasculitis
Secondary: CTD: SLE, RA
Vasculitis Involving ... Secondary: CTD: SLE ... , infections, drug ... #skin #dermatology ... #rheumatology #
Causes of Thrombocytopenia - Differential Diagnosis Algorithm
 
Decreased Megakaryopoiesis
 • Aplastic Anemia
 • Toxic Damage (e.g.
methotrexate) • Drugs ... Autoimmune • ITP • SLE ... anti-HLA antibodies Drugs ... HUS • DIC • Vasculitis ... Algorithm #Causes #Hematology
Purpura - Differential Diagnosis Framework

Non-blanchable, dark red to purple, hemorrhagic skin lesions that result from leakage
Secondary Causes: - Drug ... Splenomegaly - CTD (SLE ... Associated - SLE ... Differential #Diagnosis #hematology ... #rheumatology #
Dermatological semiology of Cutaneous Vasculitis 

Clinicopathologic correlations
 • Purpura, papules, pustules, necrosis: involvement of small vessels
angiitis (40%) • Drug-induced ... vasculitis (20% ... disease (10%) : SLE ... #dermpath #dermatology ... #semiology #signs
Autoantibodies and their Disease Associations
ANA - Non-specific; common in SLE, autoimmune hepatitis
Anti-CCP, Rheumatoid factor - RA
Anti-dsDNA
Anti-histone - Drug-induced ... SLE Anti-Jo-1 - ... disease c-ANCA - Vasculitis ... granulomatosis p-ANCA - Vasculitis ... diagnosis #table #rheumatology
Clinical Features of Systemic Lupus (SLE)
General: Fever (50%), Depression, Fatigue (75%), Weight loss (50%)
Eye: Sjögrens (15%)
Skin
Systemic Lupus (SLE ... Butterfly rash, Vasculitis ... Thrombocytopenia #Lupus #SLE ... erythematosus #signs ... symptoms #diagnosis #rheumatology
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
Drug Associated ... purpura: strong sign ... polyarteritis, drug-induced ... , and SLE) • Urinalysis ... differential #diagnosis #rheumatology
Drug Induced Lupus vs SLE
Drug Induced Lupus (DIL):
 • Epidemiology: -10% of all lupus cases, drug-dependent,
Drug Induced Lupus ... vs SLE Drug Induced ... Erythematosus (SLE ... #comparison #table ... #rheumatology #
ANA (Antinuclear Antibody) and ANCA (Antineutrophil cytoplasmic antibodies)
 • Systemic lupus erythematosus
   1. Anti-dsDNA
Anti-histone (in drug-induced ... SLE) • Systemic ... ANCA-Associated Vasculitis ... Renal-limited vasculitis ... antibodies #diagnosis #rheumatology
Systemic Lupus Erythematosus - Diagnosis
Manifestations:
 - Arthritis 69%
 - Malar rash 40%
 - Fever 36%
 -
involvement 3% SLE-Related ... Lupus Mimickers: Drug-induced ... Lupusreference #SLE ... autoantibodies #signs ... #differential #rheumatology