Autoimmune Hemolytic Anemia in Children
40 cardsCase study and overview of autoimmune hemolytic anemia (AIHA) in a pediatric patient, including diagnosis, classification, and pathophysiology.
40 cards
Review
Spaced repetition shows you each card at the optimal time for long-term memorization, with increasingly spaced reviews.
Question
What are key signs of AIHA?
Answer
Jaundice and scleral icterus are key signs of AIHA.
Question
What is AIHA?
Answer
AIHA is an immune-mediated destruction of red blood cells, leading to hemolytic anemia.
Question
How is AIHA classified by etiology?
Answer
AIHA can be primary (idiopathic) or secondary to infections, drugs, autoimmune diseases, or malignancies.
Question
What is warm AIHA?
Answer
Warm AIHA is primarily IgG-mediated, often seen in children, and active above 37°C.
Question
What is cold AIHA?
Answer
Cold AIHA is IgM-mediated and involves complement activation.
Question
Name a complication of severe anemia.
Answer
Severe anemia can lead to hypoxia and heart failure.
Question
How does AIHA affect the kidneys?
Answer
AIHA can cause acute kidney injury due to hemoglobinuria.
Question
What are key signs of AIHA?
Answer
Jaundice and scleral icterus are key signs of AIHA.
Question
What urinalysis results suggest AIHA?
Answer
Dark, red-brown urine with blood, protein, and urobilinogen indicates AIHA.
Question
What indicates acute anemia in lab tests?
Answer
An Hb of 6.3 g/dL indicates acute anemia.
Question
Which lab finding suggests increased RBC destruction?
Answer
Elevated LDH and unconjugated bilirubin suggest increased RBC destruction.
Question
What is a positive DAT result in AIHA?
Answer
A positive DAT (Coombs) test for IgG and C3 confirms AIHA.
Question
What RBC morphology is seen in AIHA?
Answer
Blood smear shows spherocytes and schistocytes in AIHA.
Question
What antibodies are involved in AIHA?
Answer
The immune system produces autoantibodies against red blood cell antigens in AIHA.
Question
What is the primary antibody in warm AIHA?
Answer
IgG antibodies are the primary type in warm AIHA.
Question
What is the mechanism of RBC destruction in AIHA?
Answer
IgG antibodies bind to RBCs, leading to macrophage recognition and extravascular hemolysis.
Question
Where are RBCs primarily destroyed in warm AIHA?
Answer
RBCs are primarily destroyed in the spleen (extravascular hemolysis) in warm AIHA.
Question
What happens to RBCs after partial phagocytosis?
Answer
After partial phagocytosis, RBCs circulate as spherocytes until sequestered in the spleen.
Question
Name a risk factor for AIHA.
Answer
Recent infection or drug exposure can be a risk factor for AIHA.
Question
How does immune system immaturity relate to AIHA?
Answer
Immune system immaturity in children is a risk factor for AIHA.
Question
What triggers can lead to AIHA?
Answer
Viral or bacterial triggers can lead to AIHA.
Question
What is AIHA?
Answer
AIHA is an immune-mediated destruction of red blood cells, leading to hemolytic anemia.
Question
How is AIHA classified by etiology?
Answer
AIHA can be primary (idiopathic) or secondary to infections, drugs, autoimmune diseases, or malignancies.
Question
What is warm AIHA?
Answer
Warm AIHA is primarily IgG-mediated, often seen in children, and active above 37°C.
Question
What is cold AIHA?
Answer
Cold AIHA is IgM-mediated and involves complement activation.
Question
Name a complication of severe anemia.
Answer
Severe anemia can lead to hypoxia and heart failure.
Question
How does AIHA affect the kidneys?
Answer
AIHA can cause acute kidney injury due to hemoglobinuria.
Question
What urinalysis results suggest AIHA?
Answer
Dark, red-brown urine with blood, protein, and urobilinogen indicates AIHA.
Question
What indicates acute anemia in lab tests?
Answer
An Hb of 6.3 g/dL indicates acute anemia.
Question
Which lab finding suggests increased RBC destruction?
Answer
Elevated LDH and unconjugated bilirubin suggest increased RBC destruction.
Question
What is a positive DAT result in AIHA?
Answer
A positive DAT (Coombs) test for IgG and C3 confirms AIHA.
Question
What RBC morphology is seen in AIHA?
Answer
Blood smear shows spherocytes and schistocytes in AIHA.
Question
What antibodies are involved in AIHA?
Answer
The immune system produces autoantibodies against red blood cell antigens in AIHA.
Question
What is the primary antibody in warm AIHA?
Answer
IgG antibodies are the primary type in warm AIHA.
Question
What is the mechanism of RBC destruction in AIHA?
Answer
IgG antibodies bind to RBCs, leading to macrophage recognition and extravascular hemolysis.
Question
Where are RBCs primarily destroyed in warm AIHA?
Answer
RBCs are primarily destroyed in the spleen (extravascular hemolysis) in warm AIHA.
Question
What happens to RBCs after partial phagocytosis?
Answer
After partial phagocytosis, RBCs circulate as spherocytes until sequestered in the spleen.
Question
Name a risk factor for AIHA.
Answer
Recent infection or drug exposure can be a risk factor for AIHA.
Question
How does immune system immaturity relate to AIHA?
Answer
Immune system immaturity in children is a risk factor for AIHA.
Question
What triggers can lead to AIHA?
Answer
Viral or bacterial triggers can lead to AIHA.
Start a quiz
Test your knowledge with interactive questions