Thursday, March 19, 2015

Study group discussion: Hemolytic disease of new born

What is immunogenic hemolytic disease of new born?

Answer: In immunogenic type, the immune system plays a role in the pathogenesis of the disease. Rh incompatibility is an example.

What are the causes of non-immunogenic erythroblastosis fetalis?

Answer: Examples of non immunogenic erythroblastosis fetalis are iron deficiency anemia, CMV infection in mother, etc.

Can congenital hemolytic anemia be a cause of non-immunogenic erythroblastosis fetalis?

Answer: Yes.
Though usually, hemolytic anemias don't present till later in life (Mostly because of HbF).
Exceptions would be severe alpha thalassemia in which all 4 alpha chain synthesis is deleted. 4 gamma chains combine, leading to the formation of HbH (Bart's hemoglobin!) They die in utero due to severe hypoxia and hydrops.

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