骨髓有核细胞增生度对于各类型血液病的诊断、放疗、化疗的疗效观察、指导疗法、判断疗效及预后都有重要意义。过去常以低倍镜下观察成熟红细胞与有核细胞的大致比例评诂 ,不够准确。特别是目前在骨髓增生度五级分类法的基础上提出的七级分类法对两者比例的计算提出了更高的要? Bone marrow nucleated cell proliferation has important significance for the diagnosis of various types of hematological diseases, radiotherapy, chemotherapy observation, guidance therapy, judgment of efficacy and prognosis. In the past, the general ratio of mature erythrocytes to nucleated cells was often observed under low magnification and was not accurate enough. In particular, the seven-level classification method proposed on the basis of the five-level classification of myeloproliferative diseases puts forward a higher priority for the calculation of the proportion of the two.