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Autoimmune Hemolytic Anemia (AIHA) - Differential Diagnosis Table

Warm AIHA (48-70%)
Cold AHA (16-32%)
 • Donath-Landsteiner HA (paroxysmal
Hemolytic Anemia (AIHA ... - Differential Diagnosis ... Table Warm AIHA ... DAT-negative AIHA ... #Differential #Diagnosis
Autoimmune Hemolytic Anemia (AIHA) Pathophysiology - Warm vs Cold AIHA
Warm AIHA:
 - 70%; IgG mediated
 -
Hemolytic Anemia (AIHA ... - Warm vs Cold AIHA ... Warm AIHA: - 70% ... spherocytes Cold AIHA ... Pathophysiology #diagnosis
Causes of Extravascular and Intravascular Hemolysis - Differential Diagnosis Algorithm
Extravascular - Spleen and RES-mediated hemolysis
 -
- Differential Diagnosis ... Immune-Mediated • Warm AIHA ... • Cold AIHA ... • Drug-induced AIHA ... #Differential #Diagnosis
Autoimmune Hemolytic Anemia (AIHA)

WARM AHA
- Primary - Idiopathics
- Secondary
Infectious
 • Viral- HIV, EBV, HCV, HEV
 •
Hemolytic Anemia (AIHA ... ) WARM AHA - ... alpha-methyldopa COLD AHA ... Hemolytic #Anemia #AIHA ... #Diagnosis #Differential
Warm Antibody Autoimmune Hemolytic Anemia 
1) DIAGNOSE AIHA
 • Anemia: macrocytic > normocytic, ↑ reticulocytes
 •
Hemolytic Anemia 1) DIAGNOSE ... AIHA • Anemia ... screening 3) TREAT AIHA ... Hemolytic #Anemia #diagnosis
Hemolysis - Differential Diagnosis Framework

1) Environment
  - Fragmentation
  - MAHA: TTP, HUS, DIC, HELLP
- Differential Diagnosis ... Autoimmune: Warm AIHA ... , Cold AIHA, Transfusion ... #Differential #Diagnosis
Diagnostic Framework for Hemolysis - Intravascular vs Extravascular Causes
Intravascular Hemolysis:
 • Mechanical Trauma (Microangiopathic hemolytic anemia):
Diagnostic Framework ... - Autoimmune (AIHA ... - Autoimmune (AIHA ... #differential #diagnosis
Abnormal Liver Function Tests - Differential Diagnosis Algorithm for Transaminitis
Hepatocellular Pattern (ALT or AST > ALP):
- Differential Diagnosis ... Viral, Ischemia, AIH ... - Viral, AIH ... Alcohol, Viral, HH, AIH ... Transaminitis #Algorithm #diagnosis
Causes of Hypocomplementemia - CHAMPS Mnemonic
C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis
H - Heavy Chain deposition
atheroembolic, AIHA ... CHAMPS #Mnemonic #diagnosis
Differential Diagnosis for Hemolytic Anemia
Intrinsic Causes:
 • Enzyme deficiencies ex. G6PD, pyruvate kinase 
 • Hemoglobinopathies
Differential Diagnosis ... Hypersplenism • AIHA ... #Differential #Diagnosis