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白血病前期(白前)是指某些急性白血病在其显露之前,有一段不能确诊为白血病的血液学异常时期。1953年Block等首先报告了这样的病例,目前白前已经得到广泛的承认。
Pre-leukemia (pre-white) refers to some acute leukemia before its appearance, there is a period of hematological abnormalities can not be diagnosed as leukemia. Block first reported such a case in 1953 and so on. Currently, it has been widely recognized in the past.