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==Overview==
==Overview==
Autoimmune hemolytic anemia is classified into three broad categories. These include warm-antibody type, cold-antibody type, and mixed-antibody type. Each category is characterized by a different autoantibody (IgG or IgM) and different optimal binding temperatures (37 degrees Celsius or 4-18 degrees Celsius). Each condition is associated with different triggers, including infections, medications, and malignancies. The warm-antibody type is the most common, and the mixed-antibody type is rare and not well characterized.
Autoimmune hemolytic anemia is classified into 3 broad categories. These include warm-[[antibody]] type, cold-antibody type, and mixed-antibody type. Each category is characterized by a different [[autoantibody]] ([[IgG]] or [[IgM]]) and different optimal binding temperatures (37 degrees Celsius or 4-18 degrees Celsius). Each condition is associated with different triggers, including [[infections]], [[medications]], and [[malignancies]]. The warm-antibody type is the most common, and the mixed-antibody type is rare and not well characterized.


==Classification==
==Classification==


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Latest revision as of 19:19, 22 May 2018

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Assosciate Editor(s)-In-Chief: Prashanth Saddala M.B.B.S; Shyam Patel [2], Irfan Dotani [3]

Overview

Autoimmune hemolytic anemia is classified into 3 broad categories. These include warm-antibody type, cold-antibody type, and mixed-antibody type. Each category is characterized by a different autoantibody (IgG or IgM) and different optimal binding temperatures (37 degrees Celsius or 4-18 degrees Celsius). Each condition is associated with different triggers, including infections, medications, and malignancies. The warm-antibody type is the most common, and the mixed-antibody type is rare and not well characterized.

Classification

Category Features Subtypes

Warm-antibody type

  • Accounts for ~75% of cases of autoimmune hemolytic anemia
  • Due to IgG autoantibody[1]
  • Binding occurs optimally at 37 degrees Celsius
  • Extravascular hemolysis (reticuloendothelial system)

Cold-antibody type

  • Accounts for ~25% of cases of autoimmune hemolytic anemia
  • Due to IgM autoantibody
  • Binding occurs optimally at 4-18 degrees Celsius
  • Intravascular hemolysis
  • Recognition by the reticuloendothelial system
  • Destruction by macrophages

Mixed warm-antibody and cold-antibody type

  • Due to IgM subtype
  • Mixed features

References

  1. Palla AR, Khimani F, Craig MD (2013). "Warm Autoimmune Hemolytic Anemia with a Direct Antiglobulin Test Positive for C3 and Negative for IgG: A Case Study and Analytical Literature Review of Incidence and Severity". Clin Med Insights Case Rep. 6: 57–60. doi:10.4137/CCRep.S11469. PMC 3623608. PMID 23645992.
  2. Bechir A, Haifa R, Nesrine BS, Emna B, Senda M, Asma A; et al. (2016). "Multiple myeloma associated with an Evan's syndrome". Pan Afr Med J. 25: 127. doi:10.11604/pamj.2016.25.127.10750. PMC 5325491. PMID 28292089.
  3. Randen U, Trøen G, Tierens A, Steen C, Warsame A, Beiske K; et al. (2014). "Primary cold agglutinin-associated lymphoproliferative disease: a B-cell lymphoma of the bone marrow distinct from lymphoplasmacytic lymphoma". Haematologica. 99 (3): 497–504. doi:10.3324/haematol.2013.091702. PMC 3943313. PMID 24143001.
  4. Moncrieff RE (1975). "Paroxysmal cold hemoglobinuria-1975". West J Med. 123 (6): 477. PMC 1130418. PMID 18747599.
  5. Packman CH (2015). "The Clinical Pictures of Autoimmune Hemolytic Anemia". Transfus Med Hemother. 42 (5): 317–24. doi:10.1159/000440656. PMC 4678314. PMID 26696800.


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