结论：骨髓活组织检查对于骨髓增生异常综合征（MDS）的阶段划分直观、明了，尤其在骨髓干抽病例更有其优越性；
Conclusion:It is simplicity and directly that to distinguished the stage of MDS with bone marrow biopsy; and for the cases of dry tap bone marrow aspiration was more useful.
朗格·汉斯组织细胞增生症是一个特发性网状组织细胞增生性病变，主要累及朗格·汉斯细胞，一种起源于骨髓的幼稚树突细胞。
Langerhans cell histiocytosis is an idiopathic reticuloendothelial proliferative disorder involving the Langerhans cell, an immature dendritic cell of bone marrow origin.
朗格·汉斯组织细胞增生症是一个特发性网状组织细胞增生性病变，主要累及朗格·汉斯细胞，一种起源于骨髓的幼稚树突细胞。
Langerhans cell histiocytosis is an idiopathic reticuloendothelial proliferative disorder involving the Langerhans cell, an immature dendritic cell of bone marrow origin.
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