<unk>  <unk>  is a delayed adverse reaction to a blood transfusion or platelet transfusion that occurs when the body has produced alloantibodies to the allogeneic transfused platelets' antigens. These alloantibodies destroy the patient's platelets leading to thrombocytopenia, a rapid decline in platelet count.<unk>  usually presents 5–12 days after transfusion, and is a potentially fatal condition in rare cases. Approximately 85% of cases occur in women. __TOC__
Post-transfusion purpura
Nonthrombocytopenic purpura
Transfusion-dependent anemia
Venom-induced consumption coagulopathy
Acute hemolytic transfusion reaction
Heparin-induced thrombocytopenia
Hyperviscosity syndrome
Thrombocytopenic purpura