Autoimmune hemolytic anemia: Difference between revisions
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[[pt:Anemia hemolítica auto-imune]] | |||
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Revision as of 19:19, 9 December 2011
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| Autoimmune hemolytic anemia | |
| ICD-10 | D59.0-D59.1 |
|---|---|
| ICD-9 | 283.0 |
| MedlinePlus | 000579 |
| MeSH | D000744 |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
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Overview
Autoimmune hemolytic anemia (AIHA) is a type of hemolytic anemia where the body's immune system attacks its own red blood cells (RBCs), leading to their destruction (hemolysis). Antibodies and associated complement system components become fixed onto the RBC surface. These antibodies can be detected with the direct antiglobulin test, also known as the direct Coombs test. AIHA can also be induced by several drugs including methyl-dopa and fluarabine.
Autoimmunity must not be confused with alloimmunity.
Classification
Haemolysis can be intravascular or extravascular.
Intravascular haemolysis
Red blood cell lysis occurs in the circulation as a result of activation of the complement system cascade.
Extravascular haemolysis
Red Blood Cells that are coated with antibodies are specifically recognised in the reticuloendothelial system and destroyed by macrophages.
Subtypes
- Idiopathic
- Systemic lupus erythematosus
- Evans' syndrome (antiplatelet antibodies and haemolytic antibodies)
- Chronic lymphocytic leukemia
- Drugs (methyldopa)
- Cold antibody autoimmune hemolytic anemia
- Mixed-type autoimmune hemolytic anemia
Laboratory findings
- Positive direct Coombs test
- Anaemia
See also
Template:Hematology Template:SIB de:Autoimmunhämolytische Anämie