8 results
Hemolytic Anemias - Differential Diagnosis Algorithm

Signs of anemia and hemolysis:
 • ↓ Haptoglobin
 • ↑ LDH
Hemolytic Anemias ... Abnormal peripheral smear ... : • Autoimmune ... Hemolytic Anemias ... (AIHAs) • Alloimmune
Warm Antibody Autoimmune Hemolytic Anemia 
1) DIAGNOSE AIHA
 • Anemia: macrocytic > normocytic, ↑ reticulocytes
 •
Warm Antibody Autoimmune ... Hemolytic Anemia ... C3d • Blood smear ... Warm #Antibody #Autoimmune ... #Hemolytic #Anemia
Autoimmune Hemolytic Anemia (AIHA) Pathophysiology - Warm vs Cold AIHA
Warm AIHA:
 - 70%; IgG mediated
 -
Autoimmune Hemolytic ... or negative - Smear ... C3 positive - Smear ... BrighamMedRes #AIHA #Autoimmune ... #Hemolytic #Anemia
Hemolytic Anemia - Differential Diagnosis Algorithm
Hereditary:
 • Peripheral blood smear + DAT + further History
 •
Hemolytic Anemia ... Peripheral blood smear ... Immune mediated hemolysis ... idiopathic, malignancy, autoimmune ... Microangiopathic hemolytic
Peripheral Blood Smear Analysis
Hypochromia
Megaloblastic Anemia
Schistocytes: Microangiopathic hemolytic anemia (e.g. DIC, TTP, HUS)
Microspherocytes: Autoimmune hemolytic anemia
Sickled red
Peripheral Blood Smear ... Microangiopathic hemolytic ... Microspherocytes: Autoimmune ... hemolytic anemia ... Peripheral #Blood #Smear
Hemolysis - Differential Diagnosis Framework

1) Environment
  - Fragmentation
  - MAHA: TTP, HUS, DIC, HELLP
Hemolysis - Differential ... Membrane): - Autoimmune ... Peripheral Blood Smear ... Urobilinogen #Hemolysis
Cold Agglutinin Disease

3 Types of Cold Sensitive Antibodies:
  1. Cold Agglutinins (CAD)
  2. Donath-Landsteiner
Viral infection, autoimmune ... Diagnosis: • hemolytic ... • Compensated hemolysis ... IgM) • Blood smear ... CLL (older) • Autoimmune
Atypical HUS - Hemolytic Uremic Syndrome
Unlike typical HUS, which is shigatoxin mediated, aHUS is not typically
Atypical HUS - Hemolytic ... minus diarrhea (autoimmune ... on peripheral smear ... Atypical #HUS #aHUS #Hemolytic