12 results
Systemic Lupus Erythematosus - Diagnosis
Manifestations:
 - Arthritis 69%
 - Malar rash 40%
 - Fever 36%
 -
Arthritis 69% - Malar ... - Hemolytic anemia ... : - ANA 95-100% ... Diagnosis and Lupus ... #rheumatology
Diagnostic Framework for Hemolysis - Intravascular vs Extravascular Causes
Intravascular Hemolysis:
 • Mechanical Trauma (Microangiopathic hemolytic anemia):
usually IgG) (e.g. lupus ... • Infections: Malaria ... disease, Copper and ... Extravascular #Causes #differential ... #anemia
Cold Agglutinin Disease

3 Types of Cold Sensitive Antibodies:
  1. Cold Agglutinins (CAD)
  2. Donath-Landsteiner
Sensitive Antibodies ... Donath-Landsteiner Antibodies ... younger pts) Differential ... chills, flank pain ... #hematology #diagnosis
Causes of Extravascular and Intravascular Hemolysis - Differential Diagnosis Algorithm
Extravascular - Spleen and RES-mediated hemolysis
 -
Intravascular Hemolysis - Differential ... Warm AIHA • Cold ... Infections • Malaria ... immune-complex hemolytic anemia ... Algorithm #Causes #Hematology
Antinuclear Antibodies (ANA)
ANA or Anti-NucIear Antibody refers to antibodies against antigens in the nucleus → like
Antinuclear Antibodies ... assay (IFA) is the main ... should be interpreted ... #rheumatology #diagnosis ... #differential
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
permanent alopecia Differential ... Non-autoimmune rheumatologic ... Arthritis: • Joint pain ... Photosensitivity • Malar ... lymphopenia, low PLT • Anemia
Features That Differentiate Acute Pericarditis from Myocardial Ischemia or Infarction and Pulmonary Embolism

In contrast to the
Features That Differentiate ... associated with rheumatologic ... presentation of systemic lupus ... trapezius ridges or shoulders ... it difficult to differentiate
Causes of Thrombocytopenia and Platelet Disorders - Differential Diagnosis and Workup
History:
 - Prior platelet count, family
Platelet Disorders - Differential ... practices that could ... anti-phospholipid antibodies ... changes), high MCV anemia ... Causes #Workup #hematology
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
- Differential ... inflammation Others: • Lupus ... such as systemic lupus ... ) pattern: antibodies ... #diagnosis #rheumatology
Rheumatology Workup - Laboratories Studies in Rheumatic Diseases

• Septic arthritis - Gram stain and culture of
joint • Systemic lupus ... antibodies, which ... RF test should ... the presence of anemia ... low back pain)