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Hemosiderosis (AmE) or haemosiderosis (BrE) is a form of iron overload disorder resulting in the accumulation of hemosiderin. Types include: * Transfusion hemosiderosis〔1: Lu JP, Hayashi K. Transferrin receptor distribution and iron deposition in the hepatic lobule of iron-overloaded rats. Pathol Int. 1995 Mar;45(3):202-6. PubMed PMID 7787990.〕 * Idiopathic pulmonary hemosiderosis * Transfusional diabetes〔Lu JP, Hayashi K. Selective iron deposition in pancreatic islet B cells of transfusional iron-overloaded autopsy cases. Pathol Int. 1994 Mar;44(3):194-9. PubMed PMID 8025661.〕〔Lu JP, Hayashi K, Okada S, Awai M. Transferrin receptors and selective iron deposition in pancreatic B cells of iron-overloaded rats. Acta Pathol Jpn. 1991 Sep;41(9):647-52. PubMed PMID 1776464.〕 Hemosiderin deposition in the lungs is often seen after diffuse alveolar hemorrhage, which occurs in diseases such as Goodpasture's syndrome, granulomatosis with polyangiitis, and idiopathic pulmonary hemosiderosis. Mitral stenosis can also lead to pulmonary hemosiderosis. Hemosiderin collects throughout the body in hemochromatosis. Hemosiderin deposition in the liver is a common feature of hemochromatosis and is the cause of liver failure in the disease. Selective iron deposition in the beta cells of pancreatic islets leads to diabetes() 〔 due to distribution of transferrin receptor on the beta cells of islets 〔 and in the skin leads to hyperpigmentation. Hemosiderin deposition in the brain is seen after bleeds from any source, including chronic subdural hemorrhage, Cerebral arteriovenous malformations, cavernous hemangiomata. Hemosiderin collects in the skin and is slowly removed after bruising; hemosiderin may remain in some conditions such as stasis dermatitis. Hemosiderin in the kidneys have been associated with marked hemolysis and a rare blood disorder called paroxysmal nocturnal hemoglobinuria. Hemosiderin may deposit in diseases associated with iron overload. These diseases are typically diseases in which chronic blood loss requires frequent blood transfusions, such as sickle cell anemia and thalassemia, though beta thalassemia minor has been associated with hemosiderin deposits in the liver in those with non-alcoholic fatty liver disease independent of any transfusions. == Treatment == Treatment for hemosiderin focuses on limiting the effects of the underlying disease leading to continued deposition. In hemochromatosis, this entails frequent phlebotomy granulomatosis, immune suppression is required. Limiting blood transfusions and institution of iron chelation therapy when iron overload is detected are important when managing sickle-cell anemia and other chronic hemolytic anemias. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hemosiderosis」の詳細全文を読む スポンサード リンク
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