9 results
Seronegative Inflammatory Arthritis - Differential Diagnosis
 • Seronegative Rheumatoid Arthritis 
 • Infectious Arthritis: Viral, Bacterial,
: Systemic Lupus ... Erythematous, Systemic ... Undifferentiated UCSD ... #Arthritis #arthritides ... #rheumatology
Hypersensitivity: Summary
Type I Hypersensitivity:
 • Immunological Mediator: lgE
 • Immunological Target: Allergen Molecules
 • Ex: Antibiotic
Gravis, Graves' Disease ... • Ex: Systemic Lupus ... Erythematosus, ... Reactive Arthritis ... Classification #Diagnosis
Antinuclear Antibodies (ANA)
ANA or Anti-NucIear Antibody refers to antibodies against antigens in the nucleus → like
Juvenile Idiopathic Arthritis ... scleroderma), Rheumatoid Arthritis ... Juvenile Idiopathic Arthritis ... Drug-Induced, Inflammatory ... #diagnosis #differential
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
, Haemolytic disease ... Examples: Rheumatoid arthritis ... glomerulonephritis, Systemic lupus ... erythematosus Type ... Examples: Contact dermatitis
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
during hemolytic disease ... glomerulonephritis, rheumatoid arthritis ... , and systemic lupus ... erythematosus ... #Reactions #Table
Macrophage Activation Syndrome (MAS)
Classified among the secondary or acquired forms of haemophagocytic lymphohistiocytosis (sHLH)

What?
A subset of
juvenile idiopathic arthritis ... erythematosus ... juvenile idiopathic arthritis ... • Drug-induced hypersensitivity ... Activation #Syndrome #Diagnosis
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
and often causes arthritis ... Glomerulonephritis, arthritis ... mucositis - Rash, arthritis ... , drug reactions ... #rheumatology #
Rheumatology Workup - Laboratories Studies in Rheumatic Diseases

• Septic arthritis - Gram stain and culture of
• Septic arthritis ... Arthritis: • ... when rheumatoid arthritis ... of reactive arthritis ... #Rheumatoid #Arthritis
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
, drug reactions ... mucositis • Rash, arthritis ... and often causes arthritis ... Glomerulonephritis, arthritis ... #Rheumatology