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Microangiopathic hemolytic anemia : ウィキペディア英語版
Microangiopathic hemolytic anemia

In medicine (hematology) microangiopathic hemolytic anemia (MAHA) is a microangiopathic subgroup of hemolytic anemia (loss of red blood cells through destruction) caused by factors in the small blood vessels. It is identified by the finding of anemia and schistocytes on microscopy of the blood film.
==Presentation==
In diseases such as hemolytic uremic syndrome, disseminated intravascular coagulation, thrombotic thrombocytopenic purpura, and malignant hypertension, the endothelial layer of small vessels is damaged with resulting fibrin deposition and platelet aggregation. As red blood cells travel through these damaged vessels, they are fragmented resulting in intravascular hemolysis. The resulting schistocytes (red cell fragments) are also increasingly targeted for destruction by the reticuloendothelial system in the spleen, due to their narrow passage through obstructed vessel lumina. It is seen in systemic lupus erythematosus because the immune complex aggregates with platelets, which creates intravascular thrombi. Microangiopathic hemolytic anemia is also seen with cancer.
Automated analysers (the machines that perform routine full blood counts in most hospitals) are generally programmed to flag blood films that display red blood cell fragments or ''schistocytes''.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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