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Hemolytic Anemias - Differential Diagnosis Algorithm

Signs of anemia and hemolysis:
 • ↓ Haptoglobin
 • ↑ LDH
of anemia and hemolysis ... Immune-mediated Hemolysis ... : • Autoimmune ... (AIHAs) • Alloimmune ... Nonimmune-mediated Hemolysis
Autoimmune Hemolytic Anemia (AIHA) - Differential Diagnosis Table

Warm AIHA (48-70%)
Cold AHA (16-32%)
 • Donath-Landsteiner HA (paroxysmal
Autoimmune Hemolytic ... Anemia (AIHA) - ... (48-70%) Cold ... MatthewHoMD #Autoimmune ... #Hemolytic #Anemia
Autoimmune Hemolytic Anemia (AIHA) Pathophysiology - Warm vs Cold AIHA
Warm AIHA:
 - 70%; IgG mediated
 -
Autoimmune Hemolytic ... Anemia (AIHA) Pathophysiology ... - Warm vs Cold ... #Autoimmune #Hemolytic ... #Anemia #Pathophysiology
Diagnostic Framework for Hemolysis - Intravascular vs Extravascular Causes
Intravascular Hemolysis:
 • Mechanical Trauma (Microangiopathic hemolytic anemia):
Framework for Hemolysis ... Intravascular Hemolysis ... Extravascular Hemolysis ... (AIHA)"Cold" (usually ... EricsMedicalLectures/ #Hemolysis
Causes of Extravascular and Intravascular Hemolysis - Differential Diagnosis Algorithm
Extravascular - Spleen and RES-mediated hemolysis
 -
Intravascular Hemolysis ... and RES-mediated hemolysis ... • Cold AIHA ... Intravascular - Hemolysis ... malformations #Hemolysis
Autoimmune Hemolytic Anemia (AIHA) Treatment
Warm AIHA:
1) Steroids - 1-2 mg/kg prednisone daily
   • Until
Autoimmune Hemolytic ... Anemia (AIHA) Treatment ... > 10, no more hemolysis ... #Autoimmune #Hemolytic ... #Anemia #AIHA #
Warm vs Cold Autoimmune Hemolytic Anemia
Warm Autoimmune Hemolytic Anemia:
 • Mechanism: IgG and Complement-mediated
 • Etiology:
Warm vs Cold Autoimmune ... Hemolytic Anemia ... Hemolytic Anemia ... Autoimmune Hemolytic ... Mostly transient hemolysis
Warm Antibody Autoimmune Hemolytic Anemia 
1) DIAGNOSE AIHA
 • Anemia: macrocytic > normocytic, ↑ reticulocytes
 •
Warm Antibody Autoimmune ... Hemolytic Anemia ... 1) DIAGNOSE AIHA ... reticulocytes • Hemolysis ... #Hemolytic #Anemia
Autoimmune Hemolytic Anemia (AIHA)

WARM AHA
- Primary - Idiopathics
- Secondary
Infectious
 • Viral- HIV, EBV, HCV, HEV
 •
Autoimmune Hemolytic ... Anemia (AIHA) ... alpha-methyldopa COLD ... #Hemolytic #Anemia ... #AIHA #Diagnosis
Expected DAT Results in Autoimmune Hemolysis
DAT Negative Hemolysis
 • DAT Poly ( - ), IgG (
DAT Results in Autoimmune ... Hemolysis DAT ... Negative Hemolysis ... ), C3d ( - ) WAIHA ... #Hemolysis #hematology