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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Chronic myelomonocytic leukemia ： ウィキペディア英語版 Chronic myelomonocytic leukemia Chronic myelomonocytic leukaemia (CMML) is a type of leukaemia, which are cancers of the blood-forming cells of the bone marrow. In adults, blood cells are formed in the bone marrow, by a process that is known as haematopoiesis. In CMML, there are increased numbers of monocytes and immature blood cells (blasts) in the peripheral blood and bone marrow, as well as abnormal looking cells (dysplasia) in at least one type of blood cell. CMML shows characteristics of a myelodysplastic syndrome (MDS); a disorder that produces abnormal looking blood cells, and a myeloproliferative disorder (MPD); a disorder characterised by the overproduction of blood cells. For this reason CMML was reclassified as a MDS/MPN overlap disorder in 2002. For a diagnosis of CMML, the World Health Organisation (WHO) states that the blood monocyte count must be >1x109/L, no Philadelphia chromosome or mutations in the PDGFRA or PDGFRB gene should be present, the blast count must be <20% and dysplasia of at least one lineage of myeloid blood cell should be present. Azacitidine is a drug used to treat CMML and is approved by the Food and Drug Administration (FDA) and the European Medicines Agency. Stem cell transplant is also used to treat CMML, and involves the transplantation of donor haematopoietic stem cells into the recipient. Blood transfusion and erythropoietin are used to treat disease associated anaemia.〔〔 == Classification == Leukaemia subtypes are categorised into single clinical entities so that they can be diagnosed and treated appropriately. Leukaemias are subdivided into lymphoid and myeloid neoplasms, depending on which bone marrow cells are cancerous. The myeloid neoplasms contain acute and chronic leukaemias, myelodysplastic syndromes (MDSs) and myeloproliferative neoplasms (MPNs). MPNs are characterised by increased production of myeloid blood cells, with a higher than normal number of mature cells. Unlike MPNs, MDSs have a dysfunctional production of myeloid cells with a reduced number of mature cells. Many of the cells produced in MDS are abnormal looking, known as dysplasia. CMML shows characteristics of both groups and thus is a difficult disease to categorise. 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「Chronic myelomonocytic leukemia」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.