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

Immune Complex Mediated (granular staining):
Complement: Post-strep GN ... , Lupus Nephritis ... Purpura Anti-GBM antibodies ... #diagnosis #algorithm ... #rheumatology
ANA Patterns and Associated Rheumatic Diseases:
 • Homogeneous: Systemic lupus erythematosus (SLE), Mixed connective tissue disease
ANA Patterns and ... , Drug-induced Lupus ... #Antinuclear #Antibodies ... #rheumatology #diagnosis ... #differential
Systemic Lupus Erythematosus - Diagnosis
Manifestations:
 - Arthritis 69%
 - Malar rash 40%
 - Fever 36%
 -
SLE-Related Auto-Antibodies ... : - ANA 95-100% ... Diagnosis and Lupus ... autoantibodies #signs #symptoms ... #rheumatology
Antinuclear Antibodies (ANA)
ANA or Anti-NucIear Antibody refers to antibodies against antigens in the nucleus → like
Antinuclear Antibodies ... Antibody refers to antibodies ... context of other symptoms ... #rheumatology #diagnosis ... #differential
Differential Diagnosis for a Prolonged PT and aPTT
If the PT and the aPTT are both prolonged,
Differential Diagnosis ... and the aPTT are ... antiphospholipid antibodies ... #differential # ... hematology #coagulation
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
antiphospholipid antibodies ... antiphospholipid antibodies ... Prolonged #Causes #diagnosis ... #differential # ... hematology #coagulation
Causes of Thrombocytopenia and Platelet Disorders - Differential Diagnosis and Workup
History:
 - Prior platelet count, family
Diagnosis and Workup ... cases: INR/PT, aPTT ... pylori test (GI symptoms ... function test, ANA ... anti-phospholipid antibodies
Myositis and Myopathies
Polymyositis 
 • Progressive, symmetric muscle weakness 
 • Elevated CK, +Anti-Jo, +Anti-Mi2
Dermatomyositis
joint aches • +ANA ... uncommon 5-15% of lupus ... Myopathies #myopathy #differential ... #diagnosis #comparison ... #rheumatology
Drug Induced Lupus vs SLE
Drug Induced Lupus (DIL):
 • Epidemiology: -10% of all lupus cases, drug-dependent,
Constitutional symptoms ... Workup: - ANA ... #sle #comparison ... #table #rheumatology ... #diagnosis #management
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
permanent alopecia Differential ... Diagnosis: • ANCA-associated ... Non-autoimmune rheumatologic ... : • Symptoms limited ... #Rheumatology