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Autoimmune Hemolytic Anemia (AIHA) - Differential Diagnosis Table

Warm AIHA (48-70%)
Cold AHA (16-32%)
 • Donath-Landsteiner HA (paroxysmal
Autoimmune Hemolytic ... Table Warm AIHA ... AHA (16-32%) • ... Agglutinin Disease ... #Table #hematology
Autoantibodies and their Disease Associations
ANA - Non-specific; common in SLE, autoimmune hepatitis
Anti-CCP, Rheumatoid factor - RA
Anti-dsDNA
their Disease Associations ... common in SLE, autoimmune ... microsomal) - Autoimmune ... #diseases #diagnosis ... #table #rheumatology
Cold Urticaria
Prevalence - 0.05% in the population
Disease onset - Mostly 2nd to 4th decades of life
Causes
clinical associations ... Autoimmune diseases ... #Urticaria #diagnosis ... #rheumatology # ... comparison #table
Autoantibodies in Rheumatology
 • Lupus (SLE): ANA (anti-nuclear antibody), dsDNA (double-stranded DNA), Anti-Smith, Anti-Ro (SSA) and
Autoantibodies in Rheumatology ... • Lupus (SLE): ANA ... , Others: SRP, Mi ... #diagnosis #associations ... #table
Cold Agglutinin Disease

3 Types of Cold Sensitive Antibodies:
  1. Cold Agglutinins (CAD)
  2. Donath-Landsteiner
Viral infection, autoimmune ... Diagnosis: • hemolytic ... CLL (older) • Autoimmune ... hemolytic #anemia #hematology ... #diagnosis
Diagnostic Framework for Hemolysis - Intravascular vs Extravascular Causes
Intravascular Hemolysis:
 • Mechanical Trauma (Microangiopathic hemolytic anemia):
Diagnostic Framework ... (AIHA)"Cold" (usually ... (e.g. primary cold ... , Copper and lead ... #hematology #anemia
Antinuclear antibodies and Systemic lupus
Anti-dsDNA	60-80%	Association with disease activity (when with Farr assay) and lupus nephritis. Can
with disease activity ... searched for when ANA ... erythematosus #diagnosis ... #rheumatology # ... table #ANA
Multiple Myeloma and Monoclonal Gammopathies
C - HyperCalcemia- calcium > 11 mg/dL / >1 mg/dL the ULN
R
ULN R - Renal disease ... focal lesions on MRI ... autoimmune diseases ... Gammopathies #MGUS #diagnosis ... #hematology #oncology
Cryofibrinogenemia Summary

Cryofibrinogenemia Epidemiology:
 • 40-70 years with a modest female predominance

Cryofibrinogenemia:
 • The precipitation of a
- Albumin - Cold ... associated with autoimmune ... Cryofibrinogenemia Diagnosis ... Cryofibrinogenemia #diagnosis ... #rheumatology #
Inflammatory Myopathies
Dermatomyositis
 • Onset: Subacute
 • Pattern: Proximal
 • CK: Up to 50X ULN
 • Autoantibodies:
Anti-MDA5, anti-Mi ... exclusion Necrotizing Autoimmune ... Pattern: Proximal and ... #comparison #rheumatology ... #table